[[quoteright:200:[[Franchise/TheLegendOfZelda http://static.tvtropes.org/pmwiki/pub/images/triforce2.jpg]]]]

->''Just the place for a Snark! I have said it twice: \\
That alone should encourage the crew. \\
Just the place for a Snark! I have said it thrice:\\
What I tell you three times is true.''
-->-- '''Lewis Carroll''', ''TheHuntingOfTheSnark''

Sometimes called trebling, the Rule of Three is a pattern used in stories and jokes, where part of the story is repeated three times, with minor variations. The first two instances build tension, and the third releases it by incorporating a twist.

This is especially common in storytelling. [[YoungestChildWins The third of three brothers succeeds after his older siblings each failed.]] The protagonist is given three tests and receives the prize after the third. It's almost unusual to find a folktale that does ''not'' incorporate the Rule of Three in some form. This may be an artifact of the oral tradition, in which the stock formula of the first, second, and third attempts makes the story easier to remember.

Following on from the oral tradition, speech-writers have learnt the 'Rule of Three' - listen to a political speech - the points come in threes, from 'Ein Volk, Ein Reich, Ein Führer' to Tony Blair declaring 'Education, education, education'.

The Rule of Three is also used widely in comedy. Many popular jokes are based on three {{Stock Character}}s (e.g. Priest, Imam, Rabbi), all in the same situation. The first two react normally, the third does something ridiculous (but stereotypically in character). In Britain, ''Englishman, Irishman and Scotsman'' jokes denigrate either the Irishman as stupid or the Scotsman as a tightwad, while the Englishman is usually the StraightMan of the gag (Unless it's being told by the Scots or Irish. When an American tells it, Englishmen are stuffed shirts.) This is why most Americans have [[BritainIsOnlyLondon never heard of Wales]]. Another (geeky) variant is the engineer/physicist/mathematician series of jokes, however, these are virtually never considered offensive, largely because the stereotypes are often jokingly accepted by the members of those three groups. (e.g. The engineer is overly practical, the physicist makes large assumptions, and the mathematician comes up with [[MathematiciansAnswer a correct, but useless answer]]; these are played up for humorous effect, but have some valid basis.)

A more popular variation on the rule is to repeat the same joke or concept three times, but put a twist on the third one that makes it funny again. One version of this is TheTriple, wherein a character lists three items - the first two logical and serious, and the [[ArsonMurderAndJaywalking third applying a twist or joke]]. For example, a character might say [[IgnoreTheDisability to a bald person]], "Can I get you anything? Cup of coffee? Doughnut? Toupee?" (From ''TheDickVanDykeShow''.)

Alternatively, the twist can come during the second iteration (such as ChekhovsSkill) [[SubvertedTrope failing the first time it's used]] only to return to its original form on the third pass; this version tends to accompany [[ThisIndexWillBeImportantLater Chekhov's tropes]].

The OverlyLongGag could be seen as a subversion of the RuleOfThree, because it fails to deliver the expected twist.

Sometimes, an event needs to be shown three times to establish that a variation to the norm is happening. The first time the audience sees this event, they see it happening a certain way, but they don't yet know that this is typical. The second time they see it, it is the same as the first. This establishes that this is the standard way that things always happen. The third time they see the event in question, it is different, so the audience knows that this is a deviation from the norm. For example, in ''Film/TheShawshankRedemption'', we see Red appear before the parole board three times. The first two appearances are practically identical. The third instance is different, indicating how Red changed after Andy left.

The trope is also incredibly common in fairytales and ghost stories that are part of oral tradition. The reason above is important, as audiences don't have a good idea of how this ghost/gnome/witch would typically behave, and it works well for building tension too. But another reason is that it's easy to remember. You get three times the story padding for only having to remember one short story and some minor variations. This makes the story easier to remember than non-repeating tales of the same length, both for professionals who collect as many stories as possible, and for people that pass a story on pretty much because they happened to remember it.

In art, there's a rule of ''[[http://en.wikipedia.org/wiki/Rule_of_thirds thirds]]'' where putting items in the intersections between thirds-lines draws more attention and is more visually appealing than plonking them right in the center, which is considered boring. In design, particularly three-dimensional design such as shop displays, groups of three objects, or objects arranged to form a triangle, are considered most attractive to the eye.

The Rule of Three may be a subtrope of a more general psychological phenomenon, as threes are well-noted in all forms of culture. Films, books and plays come in trilogies. They have a ThreeActStructure, a Beginning, Middle and End. Counts of three elements are used widely in rhetoric, writing and myth: "Ready, aim, fire", "Veni, Vidi, Vici", "Lights, camera, action", "Reading, 'riting, 'rithmetic," "rhetoric, writing and myth". Just try and think about how many times you've heard the phrase [[OnThree "On the count of three..."]]

A constructed phrase such as "Veni, Vidi, Vici." that has three grammatically and logically connected elements is known as a Tricolon. When the three elements increase in length, it's a Tricolon Crescens.

This is why there are {{Power Trio}}s and {{Terrible Trio}}s.

Variations on this trope include uses of 5, 7, 12, and convenient multiples of 5 afterwards (i.e., 25 or 50, but not 35 or 70).

{{Sub Trope}}s include ThreeWishes, TheseQuestionsThree, ThirdTimesTheCharm, TrilogyCreep, OnThree, CountingToThree, TheThreeCertaintiesInLife, and TwoOutOfThreeAintBad.

See also [[{{Conflict}} Basic Conflicts]] and other plot devices which often come in [[NumerologicalMotif 3s or 7s]], and Administrivia/ThreeRulesOfThree, a wiki guideline. Not to be confused with [[FourIsDeath 4]], unless you're counting [[FourElementEnsemble elements]], [[FourTemperamentEnsemble bodily fluids]], and other dimensions.[[note]][[Film/MontyPythonAndTheHolyGrail 5 is right out.]][[/note]]



* It's a general law of advertising that the product will be mentioned at least three times, to ensure it lodges firmly in the brain.
* ''Nick At Nite'' has run commercials for itself, emphasizing this type of comedy bit and going so far as to call it 'the triple'.
* "Advertising/HeadOn, apply directly to the forehead. Advertising/HeadOn, apply directly to the forehead. Advertising/HeadOn, apply directly to the forehead."
** And its lesser-known sister ad: "Freedom from hemmorhoids, [=FREEdHEM=] hemmorhoid cream. Freedom from hemmorhoids, [=FREEdHEM=] hemmorhoid cream. Freedom from hemmorhoids, [=FREEdHEM=] hemmorhoid cream."
* A Toyota commercial has a hybrid car speeding along with three black horses, three white horses, three hang-gliders, and three fighter jets to show that [[LighterAndSofter soft]] and [[DarkerAndEdgier edgy]] can get along.

[[folder:Anime & Manga]]
* LampshadeHanging: ''KeroroGunsou'' episode 9 has Moa blowing up Giroro and Keroro twice in a row. Then it happens a third time, and the [[LemonyNarrator narrator]] explains that this is due to the conventions of humor.
* In the TrainingMontage of ''TowerOfGod'' there are scenes of Rak and Amigochaz throwing spears at high frequency. The first time Amigochaz proves that he is on the same level as Rak, the second time Parakewl just watches dumbfounded as he is left behind and the third time, in a thumbnail-sized addendum, you can see them still going at it at midnight.
* The ''Mazinger series'' used this trope continuously. Starting with the original TRILOGY:
** ''Anime/MazingerZ'': The titular HumongousMecha is a CombiningMecha formed by three parts: Mazinger-Z, the Hover Pilder and the Jet Scrander. The Photon Atomic Power Research Institute is protected by three HumongousMecha: Mazinger-Z, Aphrodite-A and Boss Borot. Throughout the series three {{FemBot}}s show up: Aphrodite A, Minerva-X and Diana-A. Prof. Yumi is aided by three scientists (Profs. Morimori, Sewashi and Nossori). The Boss' gang is formed by three members: Boss, Nuke and Mucha. Dr. Hell never had more than three CoDragons at once, and several times he sent three-mecha teams to take down his enemies (Aeros B1, B2 and B3; Megaron P1, P2 and P3). Baron Ashura kidnapped three workers of the Institute in one episode (Kasuya, Kata and Yokoi). A Mechanical Beast could split in three parts could act and attack independently...
** ''Anime/GreatMazinger'': The Fortress of Science is protected by three robots: Great Mazinger, Venus-A and Boss Borot. The BridgeBunnies are three. Prof. Kabuto had three sons [[spoiler:Tetsuya, Kouji and Shiro]]...
** ''Anime/UFORoboGrendizer'': Prof. Umon was assisted in the Lab by three BridgeBunnies (Hayashi, Yamada and Aoi). Makiba family was formed by three members: Hikaru, Danbei and Goro. Duke battle partners were Kouji, [[spoiler:Hikaru]] and [[spoiler:his sister Maria.]] Grendizer got three {{MidSeason Upgrade}}s: Double, Marine and Drill Spacer...
* In ''Manga/DragonBall Z'', before King Kai (King Kaio) agrees to train someone, they must make him laugh with a joke. Tien performs the multiform technique to create 3 bodies just before shouting the punchline. Thus making his joke 3 times funnier.
* RuleOfThree is referenced in ''GoldenBoy'' by a couple of proverb-misquoting Yakuza members: "Even Buddha only waited three times."
* This is all over the place in Anime/DigimonTamers.
* Manga covers for ''Manga/HighschoolOfTheDead'', the main girls stars at each 3 volumes with no changes so far, the formula is one volume for Rei then Saeko and finally Saya, they are the only main characters to appear on covers.
* ''SuzumiyaHaruhi'': The ''third'' [[spoiler:Endless Eight episode]] has Itsuki state that [[spoiler:"We have entered an endless recursion of time."]] three times in a row.
* In ''TransformersArmada'', the ultimate weapon, the Hydra Cannon, is made of three smaller uber-weapons, the Star Saber, Skyboom Shield, and Requiem Blaster. Each of these is itself made of three Mini-Cons.
* Specifically invoked by Batou in ''Anime/GhostInTheShell 2: Innocence''.
* In ''Manga/OnePiece'', there are three marine admirals: Akainu, Akojiki, and Kizaru.
** As well as three great powers: the Marines/World Government, the Seven Warlords of the Sea, and the Four Emperors.
** The Monster Trio in the Strawhat crew consists of Luffy, Zoro, and Sanji.
* In ''Manga/FairyTail'', there are three true Dragon Slayers: Natsu, Gajeel, and Wendy.
** Also, there were three active S-Class mages in the guild: Laxus, Erza, Mystogan. Then: Erza, Mirajane and Mystogan. Later: Erza, Mirajane, Gildartz. After the TimeSkip: Erza, Mirajane, and Laxus.
* In ''Anime/YuGiOh'', there are three Legendary Dragons and three corresponding Legendary Heroes. We also have the Blue-Eyes Ultimate Dragon and Cyber End Dragon, formed by fusing three of the same monsters into one. Egyptian God Monsters, of which there happen to be three, demand a sacrifice of three monsters to be summoned. There are also three levels of the Orichalcos: Seal of Orichalcos, Orichalcos Deuteros, and Orichalcos Tritos. There are three powerful magicians (Dark Magician, Dark Magician Girl, Magician of Black Chaos) that form a trio.
** And three Phantom Beasts. And three Wicked Gods. And the English manga was published as three series (Manga/YuGiOh for the first seven volumes, Manga/YuGiOh Duelist for Duelist Kingdom onward, and Manga/YuGiOh Millenium World, following the Duel City finals).
** ''[[Anime/YuGiOhGX GX]]'' even has three Kaiba [[{{Expy}} expies]].
** The same goes for quite a few regular cards. There were originally three Harpie Lady Sisters, three monsters that made up the Gate Guardian, three Machines that make up the XYZ Dragon Cannon (originally) and of course, one of the biggest rules in the game is that you can have a maximum of three copies of a card in your deck. (In most cases.)
* The 3 kids Maurice, Maeter, and Linck in EurekaSeven, as well as the number of times Nirvash and TheEND fight each other.
* {{Eyeshield 21}} ends with 333 chapters. Many of the close friendships in the series are in groups of three.
* ''Manga/{{Dokuhime}}'' has triplet princes who were predicted to be the "perfect child, protecting child, and destroying child", the last one having a tell-tale birthmark (the king loved them so he marked the other 2 and raised them all the same). Sure enough, one is [[spoiler: posing as the deceased king]], another is [[spoiler: the poison tester]], and the 3rd [[spoiler: alone is a brilliant engineer but was so traumatized by seeing his father's death that he looks a lot younger and can't stop killing things]], but that hasn't yet proved anything. Despite being triplets they no longer look the same: the one who's [[spoiler: posing as the king]] [[YoungerThanTheyLook looks older]] while the one who [[spoiler: is traumatized and can't stop killing]] [[OlderThanTheyLook looks younger.]]
* ''VampireGame'' has 3 princes who are [[spoiler: the 3 "adopted" sons of the king. Well, 2 were adopted and the 1st was illegitimate]].
* In the anime ''Anime/NeonGenesisEvangelion'', [[spoiler: there's not just one, or two, but THREE [[TheEndoftheWorldasWeKnowIt Impacts.]]]]
* Most of the skits in ''Manga/DailyLivesOfHighSchoolBoys'' rely on a triple repeat of the same joke or three jokes with the same theme.
** Three students slip on frozen puddles in one skit.
** Yoshitake's PaperThinDisguise as Karasawa by wearing a white cap works three times in the Kick The Can skit (twice on Mitsuo).
** Mitsuo makes three attempts to get a soccer ball past Hidenori during the Sure Kill Shot skit. [[spoiler:Third time ''is'' the charm in this case.]]
* ''Anime/{{Pokemon}}'' always has three main characters (Ash and his two companions, one male, one female, with Hoenn being the exception due to Max tagging along), plus the Team Rocket trio.
* In ''Manga/YuYuHakusho'', there are three main worlds separated dimensionally: The human world, the spirit world and the Makai world; the latter in turn has three major rulers: Mukuro, Yomi and Raizen ([[spoiler: when the latter one dies, a tournament is run to decide who will rule all three worlds]]). Averted in the second movie, where it's revealed that there is actually a fourth world.
* ''AhMyGoddess'' features a Goddess who plays the part of Mercury in the HonestAxe myth. The first time she makes the offering, it is a gold and silver harp to the man who she comes to love. The second time, it is an exceptionally sharp axe [[spoiler:to herself so she can break free from her spring]]. The third time, it is [[spoiler:a gold and silver bike to Keiichi who is on the verge of losing Belldandy in [[ItMakesSenseInContext a bike race against God]]]].
* Big 3: A FanNickname about the three most popular manga from Weekly Shonen Jump.

* Characters in ''ComicBook/{{Slaine}}'' constantly refer to things in groups of three - three great silences, three sorrows, etc.
* The irreducible simplicity of Ernie Bushmiller's ''Nancy'' depends in part on the principle of "the three rocks".
---> Art Spiegelman explains how a drawing of three rocks in a background scene was Ernie's way of showing us there were some rocks in the background. It was always three. Why? Because two rocks wouldn't be "some rocks." Two rocks would be a pair of rocks. And four rocks was unacceptable because four rocks would indicate "some rocks" but it would be one rock more than was necessary to convey the idea of "some rocks." --Scott [=McCloud=]
* In Marvel Comics, there are the Warriors Three, three heroic Asgardians - Fandral, Hogun, and Volstagg - who are lifelong friends and fighting companions.
* Before the ComicBook/{{New 52}}, Creator/DCComics published a limited series called ''Trinity'' essentially establishing {{Batman}}, WonderWoman, and Franchise/{{Superman}} as the center of the DC Universe. They've used the term "trinity" to refer to the three characters since. After the reboot, the first major crossover for the JusticeLeague was the ''TrinityWar'', in which three different Leagues (the main Justice League, the [[JusticeLeagueOfAmerica2013 Justice League of America]], and JusticeLeagueDark) first clash then unite, then break into three groups, each led by a different member of the "trinity" and accompanied by a different member of the "Trinity of Sin" (New 52 versions of TheQuestion and ComicBook/ThePhantomStranger, and new character Pandora). [[spoiler: The events of the "war" are revealed to be part of a plot by the Crime Syndicate, MirrorUniverse versions of the Justice League from AlternateUniverse Earth-3]]

[[folder:Fan Fic]]
* ''Fanfic/CalvinAndHobbesTheSeries'' uses this sometimes, like how there are three suspects in [[Recap/CalvinAndHobbesTheSeriesS1E26TheCaseOfTheRogueWaterBalloon "The Case of the Rogue Water Balloon"]].

[[folder:Fairy Tales and folklore]]
* Common. A selection:
** "Literature/GoldilocksAndTheThreeBears" is built around this trope. The chairs are too hard, too soft, and just right, the porridges are too hot, too cold, just right, and so on.
** In "Literature/TheThreeBillyGoatsGruff", the 3rd and largest goat defeats the troll.
** "Literature/{{Cinderella}}" traditionally goes to the ball 3 times before losing her shoe. Later, the 2 step-sisters each try the shoe on before Cinderella steps forward.
** The "Literature/ThreeLittlePigs": the first 2 pigs' houses fail to ward off the Big Bad Wolf, while the 3rd's brick house remains sturdy.
** In the Grimms' "Literature/SnowWhite" story, the wicked Queen makes three attempts on Snow White's life (a cursed comb, strangling her with a bodice lace, and the famous poisoned apple).
** In "Literature/{{Rumpelstiltskin}}", the title character gives the miller's daughter three days to [[IKnowYourTrueName guess his name]].
*** After he spun for her for three nights.
** In "Literature/JackAndTheBeanstalk", Jack steals three treasures from the giant: a bag of gold, a goose that lays golden eggs, and a singing harp.
** "The Honey Princess": Three princes are set to accomplish three tasks in order to win three princesses' hands in marriage.
** "[[http://www.surlalunefairytales.com/rumpelstiltskin/stories/3spinners.html The Three Spinners]]" help a girl against an impossible spinning task.
** In "Literature/BrotherAndSister", it is the third stream that Brother drinks from; it is the third time he goes out to hunt that the king finds Sister; it was the third time she returned from the dead that her husband caught her and brought her back to life.
** In "Literature/EastOfTheSunWestOfTheMoon", the heroine meets three women who give her gifts; she uses them to bribe her way to her husband, and the third time, he is not drugged to sleep.
** In "[[http://www.surlalunefairytales.com/maidmaleen/index.html Maid Maleen]]", when she is pretending to be the bride, she speaks to three objects; the bride must find out from her three times what she said, and the bridegroom figures out the substitution.
** In "[[http://www.surlalunefairytales.com/authors/grimms/186truesweetheart.html The True Sweetheart]]", the heroine goes to the ball three times.
* Anecdotes have plenty of examples. For an example, three nation anecdotes.
* In "Literature/TheThreeAunts", the three aunts help her on three successive nights.
* In ''Literature/IronHans'', the prince gets three chances to watch the well. He fails all the three, but only on the third is he sent away.
* In ''Literature/{{Bearskin}}'', the hero tells the youngest daughter to wait for him three years -- if he doesn't return then, he's dead and she's free to marry as she wishes.
* In ''Literature/TheLoveOfThreeOranges'' -- well, three oranges. Or citrons or whatever.
* In ''Literature/TheRoseTree'', the girl loses three sets of candles, and later gets three gifts.
* In ''Literature/TheFeatherOfFinistTheFalcon'', the daughter asks three times for a gift, meets three old women along the way, and at the end, bribes the bride three times before she manages to wake Finist.
* In ''Literature/BootsWhoMadeThePrincessSayThatsAStory'', Boots is the youngest of three brothers to try the engagement challenge.
* In Creator/TheBrothersGrimm's ''Literature/TheGoldenGoose'', three sons, and three innkeeper's daughters
* In "Literature/ThePrincessOnTheGlassHill", three brothers, three horses, and three golden apples.
* In the story CryingWolf an actual wolf appears only after the first two times the boy cried wolf.
* In ''Literature/TheBlackThiefAndTheKnightOfTheGlen'', there are three princes, and the thief tells three stories to ransom them, and the first story features three witches.
* In ''Literature/SoriaMoriaCastle'', he rescues three princess, from trolls with three, or six, or nine heads.
* In Creator/AsbjornsenAndMoe's ''Literature/TheSevenFoals'', three drinks from the flask are needed to lift the sword.
* In ''Literature/TheJezinkas'', there are three jezinkas.
* In ''Literature/JesperWhoHerdedTheHares'', he has two older brothers, and is set three tasks.
* In ''Literature/TsarevichPetrAndTheWizard'', he was one of three brothers, and finds three princesses.
* In ''Literature/TheThreeLittleMenInTheWood'', the little men.
* In ''Literature/{{Pintosmalto}}'', Betta bribes the queen three times for three nights.
* In the fable of the Honest Woodsman, a woodsman loses his ax in an accident when it flies into the river. When a water spirit appears, he tells her of his dilemma, and then she dives into the river to find his ax. It takes three such dives before the huntsman recognizes the ax as his. As a reward for his honesty, he also gets to keep the other two axes the spirit had dug up.

* In the film ''Disney/{{Mulan}}'', Mulan's family is the third in town to receive a conscription notice.
* ''Franchise/PiratesOfTheCaribbean: The Curse of the Black Pearl'': Both parley and thinking of the pirates' code as guidelines are both mentioned thrice over the course of the movie:
** Elizabeth uses parley to spare her life; Jack tries it later on his old partners to no avail; and Pintel warns Jack's captured crew not to think of playing the parley card.
** Barbossa informs Elizabeth that he finds the pirates' code to be more like guidelines than actual rules; something she recites to Jack's crew; and something they tell him at the end of the film.
* In the film ''Film/{{Teeth}}'', Dawn's nether region severs exactly three penises on screen.
* In ''Film/IndianaJonesAndTheLastCrusade'', Indy must pass three tests (The Breath of God, The Word of God and The Path of God) to get to the Grail temple.
** Then comes ''Film/IndianaJonesAndTheKingdomOfTheCrystalSkull''. "Three times it drops..." [[InevitableWaterfall Hoo boy.]]
* ''Film/MontyPythonAndTheHolyGrail'': "Who would cross the Bridge of Death must answer me these questions three, ere the other side he see....". For bonus points, the trope is subverted four times; the first time, the three questions are all easy, so the knight easily crosses. The second knight unexpectedly receives a third, difficult question which results in his death, while the third knight unexpectedly gets an easy question again but fails to answer it correctly and dies. On the final set of questions, King Arthur subverts it again by asking a question back to the bridge keeper, resulting in the ''bridge keeper's'' death.
** Possibly five times, as instead of the usual three knights/questioners/Billy Goats Gruff, there's three plus Arthur.
---> One...two...five!
---> Three, sire.
---> Three!
** Additionally "...then thou shalt count to three, no more, no less. Three shall be the number thou shalt count, and the number of the counting shall be three. Four shalt thou not count, neither count thou two, excepting that thou then proceed to three. Five is right out."
** The first castle sank into the swamp. The second castle sank into the swamp. The third castle...burned down, fell over, and then sank into the swamp..
*** But the fourth one! The fourth one stayed up!
** A deleted scene shows Arthur and Bedevere about to cross a lake, only to be accosted by the bridge keeper again, who says, "He who would cross the Sea of Fate must answer me these questions twenty-eight!" After some deliberation, Arthur and Bedevere toss him into the lake and continue on their way.
* ''Film/{{Airplane}}!''. During the landing sequence, Dr. Rumack (LeslieNielsen) steps into the cockpit three times and says "I just want to tell you both good luck. We're all counting on you" in exactly the same way: once as they begin the descent, once in the middle of the landing, and once after the plane is on the ground.
* Creator/RobertRodriguez wove multiple instances of the RuleOfThree into his scenario for ''ElMariachi''. Example: The BigBad, a heavy smoker, is twice seen striking a match off his resentful [[TheDragon Dragon's]] cheek; the third time it happens, the Dragon is doing it to the (dead) Big Bad. In his book, ''Rebel Without a Crew'', Rodriguez calls this "the kindergarten school of filmmaking", what he used to write a script that was interesting but also (and more importantly) ''quickly finished''.
* Guy Richie's first two films, ''Film/LockStockAndTwoSmokingBarrels'' and ''Film/{{Snatch}}'' feature dialogue exchanges where two characters repeat the same line of dialogue three times while responding to another character. "No, Harry, you can't" in the former and "Yeah, dad, you told us" in the latter.
* In AustinPowers, Dr. Evil's Mook Mustafa will answer a question if asked three consecutive times. The scene with him in ''The Spy Who Shagged Me'' uses the Rule twice. Austin discovers his weakness when he asks one question three times, then he asks another question three times, and finally on the third question he asks it once, then says, "Do I really have to ask you three times?" and asks it two more times, but Mustafa refuses to answer because he interrupted the questioning with a different question. Then Mustafa gets shot.
* In ''Film/NationalLampoonsChristmasVacation'' Clark asks his cousin-in-law, Eddie, "Can I refill your eggnog for you? Get you something to eat? Drive you out into the middle of nowhere and leave you for dead?"
* ''Film/DeadMenDontWearPlaid'' uses Reardon's BerserkButton thrice: the first time introduces it, the second incorporates it into a StockFootage gag, and the third time precipitates the climax.
* Film/TheThreeStooges. (Well, there were actually 6 of them, but never more than 3 in any one production.)
* Film/{{Beetlejuice}}, Beetlejuice, ''Bettlejuice''!
* The swedish classic ''Äppelkriget'' (War of the Apples) takes this for a very odd twist. At one point the story segues into the back story of three brothers who go to the city to find fame and fortune. On the way, they stumble over an old book, a carpet with a hole in it, and a dead bird, all of which the two eldest brothers reject, but the third brother takes with him, thinking that they "could be useful". When they apply for jobs, two brothers fail the psych test, but the third uses the book (a psychology textbook) and succeeds. The two eldest fail to impress the ladies, but the youngest wears his carpet as a trendy outfit and is an immediate hit. Later they're all broke, but the odor of decomposing bird leads the youngest to a stash of cash in an old recliner. Finally they've used up the money, and go back to the farm to hang themselves... and as it turns out, only the youngest managed to do that right, too.
* The [[FinalBattle Trench Attack]] from ''Franchise/StarWars: ANewHope''. First attack run, easily blown to pieces by [[RedBaron Darth Vader]]. Second run "[[AccidentalInnuendo Negative, it didn't go in.]]" Third run, Luke's all clear; he blows that thing and goes home!
* ''The Empire Strikes Back'' features three uses of this:
** Darth Vader [[YouHaveFailedMe Force-choking his subordinates]]. First, he chokes the incompetent Admiral Ozzel via video monitor and promoting Captain Piett to his place. Later, Vader kills Captain Needa for not capturing the Falcon. Then at the end, when the Falcon jumps into hyperspace and escapes, Piett expects certain death but Vader just walks off the bridge.
*** Unlike the other two, Piett didn't actually screw up. He ''did'' disable the hyperdrive, the rebels just fixed it faster than expected, and there wasn't much he could do about that. This may be why Vader spared him.
*** Director Irvin Kirschner, in the DVD commentary, says Vader is too upset that the Falcon escapes, despite the Imperials sabotaging the hyperdrive, that he merely forgets to kill a minion. Accordingly, Piett and the other officers were right to be afraid as he stormed off the bridge.
** The Millenium Falcon trying to jump into hyperspace. First they're being pursued by a Star Destroyer away from Hoth; Han attempts to jump into hyperspace but nothing happens. Then, after leaving the asteroid field and having supposedly repaired the hyperdrive, they try again and again it fails. Later, with Lando now at the controls, and with the hyperdrive supposedly fixed by Lando's mechanics, they try for the THIRD time and it still fails to go into light speed because the Empire had deactivated it! The twist is that R2D2 fixes it in time for their escape.
** C-3PO spelling out [[MillionToOneChance the ridiculous odds]] against whatever they trying to do. First he says that the odds of Han and Luke surviving a Hoth blizzard are 725 to 1. Then he says the odds of successfully navigating an [[AsteroidThicket asteroid field]] are 3720 to 1. (Prompting Han to reply "NeverTellMeTheOdds!") Finally, he tries to tell Han the odds of surviving a direct assault on a Star Destroyer, but Leia interrupts and tells him to shut up.
* The climactic battle in ''ReturnOfTheJedi'' cuts between three different sets of action and location: the forest battle, the space battle and the duel between Luke and Vader in the Emperor's throne room.
* In ''AttackOfTheClones'' Obi-Wan, Anakin and Padme are held captive in the Geonosian arena and separately has to fight three different beasts, an Acklay, a Reek and a Nexu.
* ''Film/ASoundOfThunder'' combines this with a ShoutOut to ''CapricornOne'' when Hatton congratulates the first Time Safari customers: "Today you stood shoulder to shoulder with Columbus discovering America. Armstrong stepping on the moon, Brubaker landing on Mars."
* ''Film/FightClub''. "That's three times you promised."
** On the Commentary Track, it's mentioned that this is a reference to Jesus being denied by Peter three times.
* ''Film/{{Gremlins}}'': Oh, man, does the Rule Of Three apply here big time with the rules of caring for a mogwai. 1) Keep it out of bright light, 2) Do not let it get wet and 3) No matter how much it cries or how much it begs....never let it eat after midnight.
* ''PansLabyrinth'' implements this [[WhatDoYouMeanItsNotSymbolic in almost everything]] within the plot, as emphasized and confirmed by the [[WordOfGod director]] in DVD commentary, ranging from the number of a specific set of characters, towards the number of tasks the main character must accomplish.
* ''UnfaithfullyYours'' had three fantasies over how the main character would deal with what he thought was his wife's adultery.
* In ''{{Tapeheads}}'', the owner of Fuzzball Records tries to get the main characters to make him another video "on spec" (i.e. for free) by mentioning that "All good things come in threes." Josh retorts that it's not good things, but celebrity deaths, that come in threes.
* ''Film/RunLolaRun'' loops three times through the same series of events, with [[ButterflyEffect minor to snowballing changes]] in each iteration.
* Sherman Klump is asked a Triple in ''TheNuttyProfessor'' remake:
-->'''Dean Richmond:''' Can I get you anything? Juice? Coffee? Rack of lamb?
* When Film/{{Goldfinger}} tries to kill Film/JamesBond with the industrial laser, he tells him, "The reason for our first two meetings is now clear to me. I do not intend to be distracted by a third."
* ''Film/TheDarkKnight''. The Joker twice does the "Wanna know how I got these scars?" line in a prelude to doing something nasty. The third time he's got Batman pinned.
-->'''Joker:''' You know how I got these scars?
-->'''Batman:''' No, but I know how you got ''these''! ''(shoots his forearm blades into the Joker's face)''
* Showing that it's not always good, it's used in ''TriumphOfTheWill'', and [[{{homage}} later]], as a heroic example, ''StarWars''.
* "Every magic trick has three parts or acts: the Pledge, the Turn and ''Film/ThePrestige''."
* In the DVDCommentary for ''Film/MeanGirls'', TinaFey sarcastically notes that the scene where Cady & co. are trying to arrange for Aaron to catch Regina cheating on him follows "the comedy rule of twos" and that there should really be a third method they try.
* Claudia does indeed try to kill Lilli three times in ''Film/SnowWhiteATaleofTerror'', but the first two are different from the original fairytale. She first tries to bury her in a mine cave-in and secondly by making trees fall in the forest.
* ''Film/StarTrekIntoDarkness'': The [[ManlyTears Manly]] [[SingleTear Single Tears]] as shed by Kirk, Harrison, and Spock. Each from their left eye.
* With each videotape of ''Filmgore'' came a death certificate from the distributor, Force Video, promising that the first person to be scared literally to death by the picture as certified by three physicians would be buried at the distributor's expense.
* ''Film/CaptainAmericaTheWinterSoldier'': [[spoiler: Three heroes(Captain America, Black Widow and Falcon) have to place data cards in the control centers of three Helicarriers secretly controlled by HYDRA. In a neat twist, instead of each hero inserting a card into one base, Falcon takes one while Cap takes the other two, and Widow goes undercover at the Triskelion to confront Hydra mole Alexander Pierce and unload all of SHIELD's dirty laundry on the internet.]]
* In ''Film/TradingMom'', all customers at the Mommy Market are given only three tokens, no refunds.

* A joke in 2009 uses the RuleOfThree to explain the three close celebrity deaths that year.
-->[[http://en.wikipedia.org/wiki/Farrah_Fawcett Farrah Fawcett]] died and went to heaven. Saint Peter said "You were very good on Earth, so you have been granted one wish." Farrah thought for a bit and said "I wish for the safety of all children on Earth." Half an hour later, MichaelJackson arrived in heaven.\\
Michael Jackson was surprised to find himself in heaven, but even more surprised that he was once again black. "Saint Peter," he said, "I worked pretty hard to lighten my skin over the years. Can you fix it?" Half an hour later Creator/BillyMays arrived in heaven with some [=OxiClean=].
* Jokes in general tend to make very heavy use of the RuleOfThree, especially those following the "Blonde/Brunette/Redhead" or "Nationality/Nationality/Nationality" formula.
* The sarcastic {{snowclone}} "My (whatever) is (good thing), yours is (not so good thing), his is (even worse thing)."

* In ''Literature/{{Beowulf}}'', Beowulf fights three monsters: Grendel, Grendel's mother, and the Dragon.
* ''Literature/{{Discworld}}''
** The witches coven in Lancre consists of the Maiden, the Mother, and the... er, [[TheHecateSisters Other One]], much to Granny Weatherwax's indignation.
** Tiffany Aching's attempt at making a shamble (sort of a witch's Swiss Army Knife). Makes one... fails. Makes another one... fails. On her third attempt, [[spoiler: she fails again, and realises that it was stupid to rely on the rule of three, since things don't happen like that in reality.]]
* "What I tell you three times is true", from ''Literature/TheHuntingOfTheSnark'' by Creator/LewisCarroll.
* In ''Literature/KingCrow'', the hero is visited by his corvid helper three times.
* "I tell you three times" is an override command to the supercomputer in the science fiction novel ''Literature/StandOnZanzibar'' (1968) by Creator/JohnBrunner.
* It's also the command for ''Gay Deceiver'' to store an instruction in permanent memory in ''Literature/TheNumberOfTheBeast'' (1980), by Creator/RobertAHeinlein. Based on the design philosophy that any machine or computer your life depends on should have triple redundant fail safes. The 'tell you three times' protocol was admittedly a lazy shorthand in violation of his own principle. Zeb demonstrated himself what a bad practice it was by using it to execute commands faster than they can be given consideration, whereas three honestly separate steps may have prevented him from jumping the gun.
--> "The [spaceship's] new computer was of the standard "I-tell-you-three-times" variety, a triple brain each third of which was capable of solving the whole problem; if one triplet failed, the other two would outvote it and cut it off from action, permitting thereby at least one perfect landing and a chance to correct the failure. -- ''Literature/TheRollingStones'' (1952)
* A story by Raymond F. Jones in the February 1951 issue of Astounding Science Fiction was titled "I Tell You Three Times", and related to computer controls.
* The absurdist HolyBook ''Literature/PrincipiaDiscordia'' is based on a Rule of ''Five'', which bleeds over into such works of Discordian fiction as ''Literature/{{Illuminatus}}''
* The alien race (dubbed the Ramans) that created the gargantuan space object in ''RendezvousWithRama'' by ArthurCClarke apparently do everything in threes -- triple motifs litter it. (It is implied they had three hands, and presumably also three legs). The last line of the novel uses this for a stinger. Years later, this fact served as a handy SequelHook for Clarke when he decided to let Gentry Lee write follow-ups.
* “Yet across the gulf of space, minds that are to our minds as ours are to those of the beasts that perish, intellects ''vast'' and ''cool'' and ''unsympathetic'', regarded this earth with envious eyes, and slowly and surely drew their plans against us." (H G Wells 1898 Literature/TheWarOfTheWorlds, opening paragraph). "How beautifully underplayed is that adjective ‘unsympathetic’." (Creator/BrianAldiss, Trillion Year Spree p. 152).
* ''Literature/{{Stardust}}'': The King of Stormhold has three remaining sons. Also subverts the youngest brother convention by making him pure evil, and the oldest a caring and decent man. The middle brother is a useless sex maniac. The youngest son is also the Seventh Son.
** Also subverted in the film in that the King has four remaining sons. One is TooDumbToLive, and is quickly pushed out of the tower by his brother, who has an eye for opportunity.
* ''Literature/TheHobbit'': "Third time pays all."
** Other Tolkien examples: there are three [[Literature/TheSilmarillion Silmarils]], three Elven [[Literature/TheLordOfTheRings Rings of Power]], three races that got Rings of Power, three groupings of Elves of the Light, three ancient tribes of noble Men, three archaic clans of Hobbits, and three survivor states of Númenor (Arnor, Gondor, and Umbar). [[BigBad Melkor]] disrupts the Music of the Ainur three times. Galadriel refused Fëanor's request for a lock of hair thrice, and in The Lord of the Rings gives Gimli three hairs when he asked for just one.
** There are also nine Nazgűl. Nine is thrice three, and a very important number in NorseMythology.
* Dennis Dutton might have some good points about the flaws in Christopher Booker's ''TheSevenBasicPlots''[[http://denisdutton.com/booker_review.htm]], but he really shows his ignorance of tropes when he tries to attack Booker's use of the RuleOfThree:
-->Dutton: ...while there are three bears, three chairs and three bowls of porridge in Goldilocks and the Three Bears,* there are actually four characters. The story would better support Booker* s theory were it "Goldilocks and the Two Bears".
* In ''Literature/AChristmasCarol'' by Creator/CharlesDickens, the Ghost of Christmas Past and the Ghost of Christmas Present do not change Scrooge's mind. It is the third ghost, the Ghost of Christmas Yet To Be, who convinces Scrooge to change his ways.
** Not entirely true. By the end of the Ghost of Christmas Present's visit, Scrooge is shown a pair of [[StreetUrchin street urchins]] freezing to death and shows compassion for them, only to have his earlier harsh words thrown back in his face. The RuleOfThree still applies to the story structure, though.
** Only in certain movie adaptations. In the original story Scrooge is slowly repenting of his ways from the very first ghost, and has fully repented by the end of the second. He even begins his time with the third by stating that he is a different man than he was, and is eager for the spirit to guide him further. Unfortunately, the Ghost of Christmas Yet To Come isn't the friendly sort.
** In a 2000 television adaptation starring Ross Kemp, re-telling the story in a modern London estate, the RuleOfThree applies even more - Eddie Scrooge is stuck in a GroundhogDayLoop, as after each spirit he gets to re-live Christmas Eve again and try to change things. After the first spirit, he hasn't changed a bit. After the second, he's becoming a better person but is still arrogant [[spoiler: his showing off the "new" him to his nurse ex-girlfriend results in a young homeless person dieing, as he went to get his ex rather than simply call an ambulance to help the person]]. After the third ghost, [[spoiler: he changes his ways for real and does kind acts without showing off - including calling an ambulance for the homeless person]]. Also, RuleOfThree applies even more than the ghosts. The Ghost of Christmas Past is Eddie's father, the Ghost of Christmas Present is Jacob Marley himself and the Ghost of Christmas Future is [[spoiler: the son he could have if he changes his ways]].
* In Dante's ''[[Literature/DivineComedy Inferno]]'', {{Satan}} has three faces, eternally chewing on Judas, Brutus, and Cassius.
** Also, Hell, Purgatory, and Paradise all have 9 levels, grouped into threes. In Hell, three circles apiece are devoted to sins of Incontinence, Violence, and Fraud; in Purgatory, atonement is performed for sins that involve Bad Love (Pride, Envy, and Wrath), too little love (Sloth), and too much love (Avarice, Gluttony, and Lust); and in Paradise, saints dwell in nine concentric spheres that surround the Earth, beyond which God lives. The DivineComedy actually contains many examples of the Rule of Three, and other numerology.
* In ''Literature/TheDresdenFiles'' books, all fae are bound by whatever they say 3 times. Harry mentions it several times throughout the books.
** Also, there are three main Vampire Courts (not counting the one in Asia). As of the most recent books, [[spoiler:apparently Harry caused the extinction of the entire Red Court of vampires]].
*** Well, after the events in ''Changes'' [[spoiler:the destruction of the red court vampires resets it to three vampire courts.]]
*** Also the White Court is composed of three major houses.
** The Summer and Winter factions of the fae are each ruled by a Queen, a Lady, and a Crone.
*** Also there are Three factions of Fae: Winter, Summer, and the Wyld Fae.
** There are Three Knights of the cross, with their three holy swords.
** The events of dead beat involve three [[spoiler:necromancer disciples of Kemmler]] trying to find [[spoiler:the word of Kemmler]].
*** Not necessarily. [[spoiler:Cowl claims ''not'' to be a disciple of Kemmler, only to want the power available from the Darkhallow, instructions for which are in the Kemmler book that everyone is seeking. That ''only he and his assistant Kumori,'' of all the wizards seeking the Word of Kemmler are ''never accompanied by undead of any sort'' gives serious weight to that claim.]]
* In ''Literature/TheNeverendingStory'' Atreyu must pass three gates to reach the southern Oracle. (In the movie the third gate is left out and the first replaced with one that shoots laser beams. duh.)
* Several examples in the ''Literature/HarryPotter'' canon: Harry, Ron and Hermione form a PowerTrio, whilst Malfoy is always flanked by Crabbe and Goyle; three champions, one from each of the three wizarding schools, are supposed to compete in the Triwizard Tournament, which itself is composed of three challenges; there are three Unforgivable Curses as well.
** The Triwizard champions example is a subversion, since Harry is an unexpected and unprecedented [[FourIsDeath fourth]] competitor.
** There are three Potters. [[spoiler: Later, Harry and Ginny have three children. The youngest not just the third Potter male after his father and brother, he's also the only child with black hair, and the only black-haired Potter who doesn't need glasses.]]
** In the seventh book, Luna, Neville, and Ginny make up their own trio.
** The founders of three of the four houses welcome students of all types (the fourth one abandoned the school and left a monster as a parting gift because he wanted it to be pure bloods only); in the seventh book, students from three of the four houses are LaResistance and hiding in the Room of Requirement (the fourth one is LesCollaborators and can't or won't join them), three of the four founders had their possessions made into Horcruxes, whereas the fourth owned something that can destroy them, and three of the four houses are seen fighting in the Battle of Hogwarts (the fourth is sent to the dungeons, although their head professor does battle).
** The Slytherins are only sent to the dungeon in the film. In the book they are given the same option as everyone else, either stay and fight if they are a high enough year level, or evacuate through the Room of Requirement. WordofGod says that although they all left, many returned in the charge of Hogsmeade residents along with their head of house, Slughorn, who'd rallied them all together.
** While they've met many times, Harry defeats Voldemort ''three'' times: as a baby, in first year, and in final year.
*** Harry also defeats Voldemort (or at least a horcrux of him) in book two.
** "...Born to those who have thrice defied him, born as the seventh month dies --"
** The symbol of the Deathly Hallows is triangular.
*** Also, there are three Deathly Hallows themselves; the Resurrection Stone, the Invisibility Cloak, and the Elder Wand. They were created by the three Peverall brothers: the eldest was killed for the wand, the middle killed himself to be with his dead wife, and the youngest lived to old age by "hiding from Death" with the cloak. In the movie the first two brothers are mostly silhouettes while the third brother is (more or less) fully lit.
* In Creator/DanAbnett's Literature/GauntsGhosts novel ''Only In Death'', "A traditional Tanith toast took three parts." So Larkin and Rawne toast "Old Ghosts," "Staying alive," and "Ibram Gaunt".
* In the classic MSTing of TheEyeOfArgon, [[http://www.bmsc.washington.edu/people/merritt/books/Eye_of_Argon.html Mike and the bots]] riff:
-->Mike: When I think of wisdom, I think of three names: Solomon; Creator/{{Confucius}}; Grignr.
* In one of MercedesLackey's novels, a new magic user of Native American heritage was surprised he had to do something 4 times where the Europeans were equally bound to do the same thing 3 times. The 4 directions, donchaknow!
* ''Literature/RomanceOfTheThreeKingdoms'' didn't stop at the title for this one:
** The best known example would be the three heroes Liu Bei, Guan Yu and Zhang Fei, who not only became best friends but blood brothers.
** Liu Bei would later have to make three separate visits in order to convince the tactical sage Zhuge Liang to join them.
** Guan Yu would later become leader of his own three man team, with Guan Ping and Zhou Cang.
** Averted with Sun Quan, who's leading a nation while burdened by a legacy left behind by his father Sun Jian and elder brother Sun Ce, both of whom are dead. His close confidante Zhou Yu and sister Sun Shangxiang may constitute a new three in formation.
* Creator/GuyGavrielKay's ''Literature/TheLastLightOfTheSun'' features an in-character subversion. Alun ab Owyn, who comes from a culture that is very big on the Rule of Three, hears a creature roar two times. When it doesn't roar a third, he's surprised, until he realizes that triads are a human invention, and unrelated to ancient monsters.
* The ''third'' ''[[Literature/WarriorCats Warriors]]'' series is called ''[[WarriorCatsPowerOfThree Power of Three]]'', and has ''three'' protagonists.
** And their names have ''three'' syllables each.
** Featuring ''three'' chosen ones. [[spoiler: Although there turns out to be a fourth.]]
* In ''Literature/TheNightAngelTrilogy'' lessons at The Chantry (a women's school of magic) are taught in threes, supposedly for ease of recall.
* The concept of book trilogy to begin with. The best-known example is ''Literature/TheLordOfTheRings''. ExecutiveMeddling is what caused that one to be three books, though. It's just one novel, internally divided into six books.
** And mocked by the 'ever increasingly misnamed ''Literature/TheHitchhikersGuideToTheGalaxy'' trilogy'' (six books).
** Ref. ''Literature/TheLordOfTheRings'', maybe "hexalogy" would have been too much of a pun? [[DontExplainTheJoke After all]], "hex" is also German/old-English for "witch" or "magical curse" (hence the FPS ''Hexen'').
* In a Sci-fi story "a little lubricant" (yes, ahoi DoubleEntendre) the ''third'' spaceship makes it back to Earth.
* The entirety of Wil [=McCarthy=]’s novel ''TheCollapsium'' is structured this way. It’s broken into three “books,” ''Once Upon a Matter Crushed'', ''Twice Upon a Star Imperiled'' and ''Thrice Upon a Schemer’s Plotting'', and each begins with a nearly identical setup and set of challenges for the main character. But with each iteration, the complexity of the story takes a step up, until the final section, where everything goes to hell and plot threads from all three sections pay off. By the [[WordOfGod author’s own admission]], the novel was written as a modern hard-SF fairy tale, so RuleOfThree is used ''very'' deliberately.
* Lampshaded and made an explicit magical rule in the ''PercyJacksonAndTheOlympians'' books, where the number three is sacred (three Furies, three Fates, three sons of Kronos atop three thrones), and so Half-Blood heroes going on quests are allowed only two companions. Breaking this is seen to invite trouble.
* Creator/DianaWynneJones's book ''Literature/PowerOfThree'' has this in spades, unsurprisingly. The main characters are three siblings; there are three peoples living on the Moor - Lymen, Dorig and Giants; there are three Powers, Sun, Moon and Earth. The children's father performed three tasks to win their mother, and there are three exchanges of gold collars before the conflict between the peoples can be resolved.
* In ''BeyondTheWall'' by Ambrose Bierce, Dampier heard a knocking on the wall three times. The firs time he was skeptical, the second time he answered the knocking, the morning after the third time he was discovered dead.
* Three by Ted Dekker?
* ''Literature/MobyDick'' has three threes: The chapter ''The Chase - Third Day'' marks the end of the book. Furthermore, there are three mates aboard the Pequod, Starbuck, Stubb and Flask; and three harpooners, Queequeg, Daggoo and Tashtego.
* In GrahamMcNeill's TabletopGame/{{Warhammer 40000}} Literature/{{Ultramarines}} novel ''The Killing Ground'', the Grey Knights subject Uriel and Pasanius to three tests of whether they are tainted.
** Similarly, in JamesSwallow's ''Literature/BloodAngels'' spinoff story "The Returned", Tarikus is subjected to three tests of whether he is tainted. They are explicitly billed as tests of his mind, body, and soul.
* The title character of Paulo Coelho's ''Literature/TheAlchemist'' believes that anything that happens twice WILL happen again. He is not proven wrong.
* [[LampshadeHanging Lampshaded]] in SergeyLukyanenko's ''Literature/TheStarsAreColdToys'' by an alien living computer who wonders about the human fascination with the number three. The humans are stumped, and the best explanation they can come up with is "two is not enough, and four is too much." Surprisingly, the alien is satisfied with the answer.
* In the StarTrekDeepSpaceNineRelaunch, the number three appears to have considerable significance for the cultures involved with the Wormhole Aliens; the Eav'oq, the Bajorans, and the Ascendants (who themselves make three, obviously). Connected to this, we have the trio of the Voice, the Hand and the Fire. Further, there are nine orbs (three times three), and nine Emissaries. The Wormhole Aliens certainly like the number three, though for what reason (other than this trope) is as yet unclear. Finally, the Hebitians, a race of Precursors on Cardassia, also demonstrate a great love of the number. This may not be coincidental; frequent hints that Hebitian culture is connected to that of the Bajorans suggest we have a whole interconnected spiritual community valuing the rule of three.
* ''Literature/ASongOfIceAndFire'''s ArcNumber is usually seven, but the RuleOfThree still pops up a few times.
** Jaqen H'ghar owes Arya three [[IOweYouMyLife life debts]], and in true folktale fashion she wastes the first two on trivial vendettas and [[GuileHero makes creative use]] of the last one to get what she really wants.
** Runs deep in the Danaerys chapters. She's the last of three children, she has three dragon eggs, three handmaids, and three bloodriders, etc etc. When she is scouting out from Vaes Tolloro, she sends each of her three bloodriders in a different direction. The first two come back empty-handed, the last one takes a long time but ultimately returns with three emissaries from Qarth, a city ruled by three major guilds...
** Daenerys is betrayed three times, and later on attacks three cities before settling down in the third.
** Three blasts on the horn is the ultimate OhCrap signal: [[EldritchAbomination The Others]] are coming.
** King Stannis's supporters chant "One god! One realm! One king!" which sounds like the old French slogan "One king, one law, one faith" or the NaziGermany slogan "Ein Volk! Ein Reich! Ein Führer!"
* Speaking the name of Hastur in the CthulhuMythos.
* In Teresa Frohock's ''Literature/MiserereAnAutumnTale'', Lucian denies Catarina three times. Rachael specifically points this out to Caleb: It's important.
* In ''Master of Five Magics'' and its sequals, sorcerers must recite a spell three times to make it work, and each recitation is more difficult to enunciate than the last.
* ''Literature/{{Twilight}}'' gives us this memorable gem:
--> '''Bella:''' About three things I was absolutely positive: First, Edward was a vampire. Second, there was a part of him, and I didn't know how dominant that part might be, that thirsted for my blood. And third, I was unconditionally and irrevocably in love with him.
* The second ''Literature/DeltoraQuest'' series gives us the Piran Pipe which is divided into three pieces among the three tribes following their favourite candidate for their leader ''The Piper''. They conveniently find three different islands under the earth to live in. Not to mention Lief, Barda and Jasmine the PowerTrio.
* In DevonMonk's ''[[Literature/AgeOfSteam Dead Iron]]'', [=LeFel=] tries to invoke this on Jeb Lindson -- he shouldn't have to kill him more than three times.
* Though the Winds worshiped by the [[OurDragonsAreDifferent Kantri]] number four, the Lady Shia worshiped by humans of ''Literature/TalesOfKolmar'' has [[TheHecateSisters three aspects]] of the same being. At the end of ''Song in the Silence'', Lanen thinks she has to deny Akhor three times in order to save him.
* Humorous uses of this rule in the ''AuntDimity'' series include people having to get Lori's attention by saying her name three times, each one progressively louder (Dimity has to write her efforts, the third and last one in ALL CAPS). Also, in the fire alarm farce late in ''Aunt Dimity and the Family Tree'', among those gathered in the entrance hall of Willis Sr.'s house is an elderly woman who sees no need to evacuate since she lit the fire in question. Willis Sr. steps forward to inquire who she is, and the Donovans burst in:
--> "Aunt Augusta!" Deirdre cried.\\
"Aunt Augusta?" said Willis Sr.\\
"Aunt Augusta," Declan said, with a weary sigh.
* Creator/IsaacAsimov's Three Laws of robotics.
* Literature/TheKingkillerChronicle. Though seven is really the ArcNumber of the series, 3 also carries some import:
** Giving three gifts to a tinker often heralds good fortune. Heroes in stories often receive three gifts from tinkers/benefactors.
** There is an idiomatic expression "I am telling you three times" which conveys deadly seriousness.
** And of course: "There are three things all [[TitleDrop wise men fear]]"
* In ''Literature/FirebirdLackey'', Ilya encounters the Katschei three times, and the third time kills him.
* The fourth ''Literature/MaryPoppins'' book begins by telling readers to regard the stories within as {{Interquel}}s to the first three books, because "three is a lucky number."
* In Creator/AletheaKontis's ''Literature/{{Enchanted}}'', it's Sunday's third kiss that qualifies as TrueLovesKiss.
* In Creator/SeananMcGuire's ''Literature/OctoberDaye'' novel ''Rosemary And Rue'', when Toby is contemplating a key that leaves her with a murder without a motive, a curse without a cure, and a key without a lock, she thinks of the importance of threes to the fae.
* ''Literature/TheThreeMusketeers''; except there's actually four of them after the protagonist joins the original trio.
* ''{{The Tripods}}'' series has the Masters with a lot of threes-three legs, three tentacles, three eyes, plus the titular three-legged vehicles and their three domed cities. In the television series, the caps are shown as three-sided/triangular as well. There are also three protagonists most of the time. Will is always the main character, but at first, he's traveling with his cousin,Henry, and Jean-Paul/'Beanpole', the boy they meet in France. Later, Will, Beanpole and another boy, Fritz, become the more important trio (though Henry returns in the climax).
* The three doors in ''Franchise/TheDarkTower'' book ''Literature/TheDrawingOfTheThree''.
* MichaelFlynn's Literature/SpiralArm novel ''On the Razor's Edge'' opens with the observation that it starts with three, because in these matters there are always three.
* In Creator/RebeccaLickiss's ''Literature/EccentricCircles'', Malraux cheerfully explains why there are three of them -- the youth, the father figure, the old geezer.
* In ''Literature/StrangerInAStrangeLand'', the Martians have a number system based on powers of three; they also have three stages of life.
* Creator/IsaacAsimov's ''Literature/TheGodsThemselves'' has several instances of this. Asimov wrote this novel because of complaints that his stories never featured aliens or sex; so he wrote a story full of [[BreadEggsBreadedEggs aliens, sex, and alien sex]]. The novel has three parts, the aliens are trigendered, and the first two parts end with somebody despairing that the short-sighted and selfish actions described will doom our universe. [[spoiler:The third part resolves the crisis by finding a way to avert this.]]
* In one Creator/DamonKnight story, one of the protagonists hires himself three bodyguards because "one cannot be trusted; two would probably conspire; but three can, with a minimum of effort, be kept in a state of mutual suspicion".
* In the ''Literature/RainbowMagic'' series, Special Edition books have three magical objects to find.

[[folder:Live Action TV]]
* It seems like standard procedure for the parents in a DomCom to have three children. ''Series/TheBradyBunch'' (twice over,) ''Series/GrowingPains'', ''Series/HomeImprovement'', ''Series/{{Roseanne}}'', ''TheNanny'', ''Series/FullHouse'', ''Series/{{Reba}}'' all involve the three children of the protagonists. The common reason seems to be that it covers all bases; the oldest can have typical teen problems (dating, driving, etc.), the middle can have the kid problems (first day of school, etc.), and the youngest can either sit and look cute or say random funny things. The big reason for the CousinOliver is to bring in another cute one when the child actors have the audacity to age and upset this delicate balance.
** It also could be because [[TruthInTelevision the average American nuclear family has traditionally had no more than three children]].
* Demonstrated extensively on ''Series/TheDailyShow''. Subverted on more than one occasion:
--> '''Jon Stewart''': I know comedy typically comes in threes. We threw that fourth one in there because we like to fuck with the ''structure''.
** Subverted in a running gag on the [[http://www.thedailyshow.com/watch/thu-november-10-2011/indecision-2012---mercy-rule-edition November 10, 2011 episode after Rick Perry's infamous "oops" moment during the Republican primary debate]]. Throughout the first segment Stewart begins listing things in threes, but fails to come up with a third item to complete the list.
--> '''Jon Stewart''': So that leaves three people: Jon Huntsman, Rick Santorum, and... uh.... the Transportation Department? I don't know....
* Humorously subverted by Johnny Carson on one episode of the Johnny Carson Show.
--> '''Johnny''' (reading a list of things he forgot to do in order of most recent to oldest): Call Marilyn Monroe to ask her to a dance...Call Marilyn Monroe to ask her to a movie...call Marilyn Monroe to ask to take her to dinner...remember to get Marilyn Monroe's phone number.
* "Hi, I'm Larry. This is my brother Daryl, and this is my other brother Daryl."
* When TinaFey hosted ''Series/SaturdayNightLive'', she was coached on acting by guest star Steve Martin, who slapped her early in the monologue for her self-doubt, then slapped her again later just for fun, and then one more time immediately afterwards.
-->'''Tina:''' Was that one for fun too?
-->'''Steve:''' No, that was the Comedy Rule of Three.
* ''Franchise/StarTrek'' captains (especially Picard) would frequently list off [[FamousFamousFictional three examples of some well-known cultural phenomenon]]. Typically, two of them would be what we would consider "classic" examples, and one would be either contemporary to us, or alien. For example, he might say, "Ah, yes, the great poets of history; William Shakespeare, Walt Whitman, Zyglorty Mospiqxot of T'pingnit." Or, "I've always been interested in classical music; Bach, Beethoven, the Beatles." (''Series/RedDwarf'' did this precise gag with "Mendelssohn, Mozart, Motorhead".)
** This tendency wasn't lost on the writers of ''Series/MysteryScienceTheater3000'', who'd spoof it on a regular basis.
--->'''Crow (in Kirk's voice):''' We have had many wars like this in our own history. Our Civil War of Earth. Our World War one and two. Our Krinkleganglium Wars of Kromulon Thirteen...
*** One episode of ''Series/StarTrekTheNextGeneration features this joke from a man claiming to be a historian from the 26th century. Talking to Geordi, he mentions several blind artists by surname, ending with (Stevie) Wonder. On rewatching this episode, one realises that this is meant to be a clue that he isn't from the future but from the 200 years in the past.
*** When ''Series/StarTrekTheNextGeneration'' the Enterprise got caught in a time loop, [[GroundhogDayLoop reliving the same day over and over]] -- and that day always ended with the destruction of the Enterprise. Eventually they caught onto this and decided to program a message into Data's brain to be sent back into the rift on the next iteration, and hopefully help them avoid the collision that got them caught in the rift in the first place. During the next go-round, the number three continually appeared throughout the day (Data was subconsciously repeating the pattern) until the time of the collision came again. Left with two choices about how to avoid the accident (one suggested by Data, and one by Commander Riker), they noticed that ''three'' could refer to the number of rank insignia on Commander Riker's lapel. Therefore Riker's was the right idea, not Data's.
** The main PowerTrio of [[TheKirk Kirk]], [[TheSpock Spock]], and [[TheMcCoy McCoy]] in the Original Series.
** And to top it off in the grand finale of [[Series/StarTrekEnterprise Enterprise]] has the three Enterprise Captains speaking the "these are the voyages" narration while the three Enterprises appear on the screen.
* In ''{{Blackadder}} II'', the title character seeks the help of a wise woman when he falls in love with his manservant, 'Bob' (who, unbeknownst to Blackadder, is actually a girl in drag). She suggests three "cunning plans": first, he could kill Bob. When he rejects this she suggests he could kill himself, which he's no keener on. The third plan is to ensure nobody else ever finds out: "kill everybody in the whole world!"
** In the episode "Major Star", Captain Blackadder gives Lieutenant George three rules to follow during his drag-date with General Melchett: 1) Never remove your wig. 2) Never say anything. 3) Don't get drunk and let him shag you on the veranda.
* In the ''Series/{{Lost}}'' episode "The Moth," Locke tells Charlie he will give him his heroin back only on the third time Charlie asks for it. On the DVD commentary, the writers and Dominic Monaghan joke that Charlie could have just said, "Give me my drugs, give me my drugs, give me my drugs."
* Subverted (as is almost everything) on ''SheSpies'', Cassie and Shane each offer one possible, lightly humorous, explanation for an occurrence and then DD offers a third one, no funnier than the first three. The other two girls stare at her and she declares, "The third one doesn't always have to be funnier, you know!"
* ''Series/{{House}}'' has the episode ''Three Stories'' which is ExactlyWhatItSaysOnTheTin although the stories begin to intertwine and House is trying his best to confuse the medical students about what story they are currently listening to.
** In seasons 1-3, House's diagnostic team consisted of three members: Foreman, Cameron, and Chase.
* ''Series/BabylonFive'' has this all over the place:
** The Minbari have three castes, the ruling body consists of three individuals from every caste so 3 times 3, three languages, the most holy artifact is a triangle - and they have three of them)
** Also, the Vorlon epigrams "Understanding is a three-edged sword" and "There are three sides to every question: your side, their side, and the truth"
* In the second episode of ''Series/HowIMetYourMother'' ("Purple Giraffe"), Ted throws three consecutive parties because he wants to "casually" talk to Robin, who happens not to be able to come at the two first ones.
** Pretty regular gag, in fact. Like the time Barney kept getting angry, storming out of the bar to a full dumpster, and then smashing a TV. The third time the dumpster had already been emptied, so he went to an electronics store, purchased a TV, brought it back to the alley, and smashed it.
* ''Series/{{Charmed}}'': "The power of three will set us free! The power of three will set us free! The power of thee will set us free!"
* ''Series/TheBigBangTheory'': (knock knock knock) Penny! (knock knock knock) Penny! (knock knock knock) Penny!
** (knock knock knock) Leonard and Penny! (knock knock knock) Leonard and Penny! (knock knock knock) Leonard and Penny!
** Another ''Series/TheBigBangTheory'' example, when Sheldon saved Leonard from a rocket fuel explosion in the elevator.
-->'''Leonard:''' I was just glad that Sheldon didn't rat me out to the Landlord. ... Or to the police. ... Or to Homeland Security.
* ProfessionalWrestling is fond of this in some forms, ranging from the 'Triple Threat' match (3 fighters) to audience chants; one of the most popular is to match 3 syllables (e.g. 'R V D! R V D!' for Rob Van Dam). The other popular chant format? Four syllables and five claps ('You're a loser!' * * *** ), which adds up to nine.
* Countless game shows have three contestants per episode. ''Series/{{Jeopardy}}'' and ''WheelOfFortune'' are the best known.
* Nearly every joke on ''DesperateHousewives'' follows this trope. All of Mary Alice's narratives will contain 3 examples followed by the main point.
* The three presenters on ''TopGear''. This works well, as two of them can set up a pattern and the third can break it [[RuleOfFunny for humor]].
* Lampsaded on an episode of ''Series/{{NCIS}}'': [=McGee=] is saying reasons for something
-->'''Director Vance:'''...And the third?
-->'''[=McGee=]''' How did you know there was a third?
-->'''Director Vance:''' There is always a third.
* And [[DiscussedTrope discussed]] on ''Series/NCISLosAngeles'', when Deeks makes the requisite "Gesundheit" joke after someone says a weird-sounding German name...twice, and the others all just stare at him.
-->'''Deeks:''' RuleOfThree. The third time will be hilarious.
** [[spoiler:Sure enough, it came up a third time, and Callen seemed to think it ''was'' good.]]
* ''GilmoreGirls'': I wish my mom would let me have a car... or a bike... or my roller skates back.
* ''Series/GoOn'': [[OneSceneWonder Anne's girlfriend]] plays with this: "I may not know a lot about books, or movies, or third things to end lists with..."
* ''Series/KamenRiderOOO'' has threes in everything. Three sets of three Core Medals per Greeed, three part forms for the hero, three part [[IdiosyncraticEpisodeNaming episode titles]]. The main characters themselves - Eiji, Ankh, and Hina - make up a trio. Each PreviouslyOn segment gives us "These three things happened on the last ''Kamen Rider OOO.'' The TransformationTrinket is even threefold (medals, scanner, driver.)
* In an early season of ''WalkerTexasRanger'', in the first episode of the season, Walker corners the bad guy at the end of the episode. The bad guy turns and faces Walker, assumes a "karate stance" and makes a "karate yell". Walker beats him up. In the next episode, different bad guy, same ending. In the third episode, same ending except just when you are saying "this is getting a bit old", Walker drops his shoulders, sighs and says "Not another karate guy."
* ''Series/{{Community}}'' has Britta's one-time boyfriend Vaughn, who always says hello three different ways.
---> '''Vaughn:''' Hey. What's up, man? Hi, Bro.
** This is then {{Lampshaded}} by the study group, who start to count his greetings on their fingers whenever they see him.
* ''Series/ICarly'' uses this extensively. In ''[=iSaved Your Life=]'':
--> '''Freddie''': "My mom thinks I'll choke on pills so she pounds them with a mallet and puts them in my fruit sauce."
--> '''Spencer''': "Fruit sauce?"
--> '''Freddie''': "My mom thinks I'll choke on fruit so she pounds it with a mallet--"
--> '''Spencer''': "Okay yeah, we get it."
--> '''Spencer''': "What happened to those flowers?"
--> '''Mrs. Benson''': "I soaked them in bleach and then pounded them with a mallet!"
** In ''iQuit iCarly'', after Sam & Carly have been pulled inside the building, they burst into tears and Spencer turns them to face one another so that they hug, whilst Fleck & Dave do the same thing. Spencer & Freddie look at each other & shrug, before hugging
* ''WizardOfEarthsea'': the wizard Ged knows the Dragon's true name and has Power over him.
--> Dragon: Very well, little mortal, ask your two questions.
--> Ged; Hey! Don't I get to ask '''three''' questions?
--> Dragon: Yes, you do. Now you have two questions left.
* The 2nd ''Series/CriminalMinds'' episode, "Compulsion", features a serial arsonist/murderer driven by an obsessive-compulsive disorder that forces her to repeat things in sets of three. When (pretty arbitrary) patterns of threes emerge around her it triggers her to start her next round of arson and murder.
* The Trinity Killer in ''Series/{{Dexter}}'' Season 4. 3 sets of kills spanning 30 years. [[spoiler: It turns out he actually kills in sets of 4, but this wasn't discovered as the bodies of the first bodies of every cycle were never found.]]
* This was actually very prominent in Series/TheSopranos. Junior superstitiously believes that it applies to real life, going so far as to hope that his old friend dies of cancer because . . . two of his friends have died of cancer already, and if a third meets the same fate, he'll be off the hook. Obviously cancer only targets three people of a given generation, right? It also plays into fan theories regarding the finale. Virtually every detail of the final scene evokes the number 3: there are 3 Sopranos at the table, there are 3 pictures on the wall, Meadow is able to successfully parallel park on her 3rd attempt. This brings Junior's "these things happen in 3s" theory to mind, suggesting that Tony really does die at the end to complete the trio that started with Bobby and Sil.
* DoubleSubverted with Creator/AdultSwim. In 2009, they aired ''Film/TheRoom'' for AprilFoolsDay. In 2010 and 2011 they did this again. Surely they're doing something different for 2012, right? Uh oh, their airing that movie aga--THEY BROUGHT BACK ''[[{{Toonami}} TOONAMI]]''??? AWESOME!!
* Lampshaded in ''Series/ThirtyRock'' episode "Hey Baby, What's Wrong" by dr Leo Spaceman, after the second of three of Jenna's examples of what pressure means to her.
** Another episode had Tracy afraid after two celebrities died fearing he may be next.
* On the US version of BigBrother, Boogie & Janelle have both competed 3 times, and three different Danielles have competed.
* ''Creator/MontyPython'' "Nobody expects the Spanish Inquisition! Our chief weapon is surprise...surprise and fear...fear and surprise.... Our two weapons are fear and surprise...and ruthless efficiency.... Our *three* weapons are fear, surprise, and ruthless efficiency...and an almost fanatical devotion to the Pope.... Our *four*...no... *Amongst* our weapons.... Amongst our weaponry...are such elements as fear, surprise.... I'll come in again."
** Three sketches in that episode involved the line "I didn't expect the Spanish Inquisition," which was the cue for Cardinal Ziminez and his followers to show up. The third time, they were running late and by the time they could declare, "Nobody expects the Spanish Inquisition!" the credits had rolled and the show was over.
* "Series/TheBobNewhartShow" - Bob almost falls down an elevator shaft and realizes how easily he could die. He then involkes the "Death comes in threes" - "First DeGaulle, then Mao. I could be next!"
* Over the course of ''[[Series/TwentyFour 24]]'' there were in total three moments where a character that was part of that season's main cast was killed by a character that was another member of the main cast. These notably tied in with either the revelation that their murderer was really EvilAllAlong and/or that s/he was undergoing a FaceHeelTurn.
* In the ''{{Bones}}'' episode "The Shot In The Dark", after an assailant shot Brennan, she found herself having visions of her late mother consoling and advising her. She ended up seeing her mother three times; once after she was initially shot, once after her body went into shock as a reaction to a mismatched blood-type (a key clue that the bullet that shot her was composed of [[AbnormalAmmo frozen blood]]) and once when she underwent voluntary exploratory surgery to find traces of the blood bullet that nicked her ribs, in order to link the blood bullet to her assailant.
* 1)Faster than a speeding bullet. 2)More powerful than a locomotive. 3)Able to leap tall buildings in a single bound. Look, up in the sky. 1)It's a bird. 2)It's a Plane. 3)It's ''{{SUPERMAN}}''! Superman - 1) Who can change the course of mighty rivers. 2) Bend steel in his bare hands and who 3)disguised and Clark Kent, 1)mild 2)mannered 3)reporter for a 1)great 2)metropolitan 3)newspaper, fights a 1)never 2)ending 3)battle for 1)truth, 2)justice, and 3)the American way.
* One of the main storylines of the fourth season of ''{{CSI NY}}'' was the '333 killer', who always called Mac at 3:33 am or pm, always freaking him out.
* Shows up a few times in ''Series/BuffyTheVampireSlayer'' and ''Series/{{Angel}}''.
** An early ep had the Three, the warrior vampires sent by the Master to kill Buffy. They failed, and offered their lives as penance.
** Angel had the three Transcendent Furies, who Lorne paid to keep Caritas under the non-violence spell.
** When Cordelia's mind was opened to the world's suffering by a demon, she was cured by Wes's reading of the scroll the group stole from Wolfram and Hart, ending with saying the word 'unbind' three times.
** The Wolf, Ram, and Hart, the three factions or entities of Wolfram and Hart.
** In season three of ''Buffy'', when Angel has been poisoned by Faith and needs the blood of a Slayer to cure him, Buffy punches him to get him to vamp out. Of course, she hits him once, twice, aaand the third time does it.
** From Season 9 of ''Buffy'':
--> '''Faith:''' "Brooding. Bad decisions. Violence. Rinse and repeat."
* ''Series/YesMinister'': Two notable interrelated jokes:
-->'''Bernard''': It's one of those irregular verbs, isn't it: ''I'' have an independent mind, ''you'' leak, ''he's'' round the twist.
** Later:
-->'''Bernard''': ''I'' hold confidential briefings, ''you'' leak, ''he's'' been charged under Section 2A of the OfficialSecretsAct.

* [[MemeticMutation PROTIP:]] A trio of characters from different games is a standard ''GamePro'' cover.

* The Blue Man Group has kept itself to exactly three performers because it's the smallest group possible where you can have someone excluded from a majority somehow, a recurring factor used for a lot of their humor. (The Blue Men really only have individual personalities insofar as each one winds up doing several things -- the more oddball the better -- that cause the other two to look askance at him.)
* Earth, Wind, and Fire.
** Emerson, Lake and Palmer; Crosby, Stills and Nash; Peter, Paul and Mary...
* The band The Early November (other bands have probably done this as well, but this is the only one I'm aware of) came out with a triple CD release, the collective name being The Mother, the Mechanic, and the Path.
* Once upon a time, 3/4 time in music was considered the "perfect" time signature, and 4/4 was "imperfect." They were thus indicated with a circle (a ''perfect circle'') and an incomplete circle, respectively. The former has passed into obscurity, but the latter has morphed into the lower-case C we know today. Averted nowadays; very few popular songs are ever in 3/4 time, and the "C" is commonly believed to stand for "common time."
** Except for a song to be considered a true waltz it must be in 3/4 time ("And this song of mine / in 3/4 time" - Christmas Waltz) Thus, [[VideoGame/TeamFortress2 Rocket Jump]] [[http://www.youtube.com/watch?v=eDNuX8iR1xk Waltz]] is not a waltz, but YoshisIsland [[http://www.youtube.com/watch?v=RZnu5xRa-Z4 Fortress]] is.
* Three chords is the stereotypical minimum for uninspired, bland pop/rock. Or, it could be intentional, "ThreeChordsAndTheTruth." Either way, you'll rarely see music with less, but plenty with just three.
** Subverted by Creator/SpikeMilligan with [[Radio/TheGoonShow "The Ying Tong Song"]]; Milligan wrote it because a friend bet him that he couldn't get a song with only ''two'' chords into the chart.
* Canadian musician Music/JoelPlaskett has a triple album called, fittingly, ''Three''. It even has a lyric stating "good things come in three."
** Each disk has 9 tracks, for a total of 27. He also released an EP called "Three More", which contained...3 tracks.
** AND most of the songs are in 3/4 time and contain lyrics and titles like "Rollin' Rollin' Rollin'", "Shine On, Shine On, Shine ON", etc.
* "Knock Three Times" by Tony Orlando and Dawn.
* Not really the TropeNamer, but "Rule Of Three" by the Lemonheads.
* {{Weezer}} has three self-titled albums, called Blue, Green, and Red [[FanNickname by fans]].
* The ending of the ''2112 Suite'' by Rush:
-->[[spoiler:Attention all planets of the Solar Federation.\\
Attention all planets of the Solar Federation.\\
Attention all planets of the Solar Federation.\\
We have assumed control.\\
We have assumed control.\\
We have assumed control.]]
** Even Rush itself is an example (Geddy Lee, Alex Lifeson, Neil Peart)
* EmersonLakeAndPalmer had an album called ''Trilogy'', though in a slight subversion it was their ''fourth'' album. However, it can be considered to have been their third if one ignores their ''Pictures at a Exhibition'' album, as many fans indeed do.
* In "Coward of the County" performed by Kenny Rogers, Kenny tells the story of Tommy, a man who believes in TurnTheOtherCheek. Tommy has a loved one named Becky. One day the Gatlin Boys come a callin' and subsequently take turns at Becky. Kenny makes it a point to tell you there was three of them.
* The song "Threes" by MercedesLackey and LeslieFish is built on this trope.
* As is the song "Three" by Massive Attack.
-->Three's my lucky number
-->And fortune comes in threes
* "Sometime Around Midnight" by The Airborne Toxic Event ends with a Rule of ''Five''. This functions as a bit of BreakingTheFourthWall; the listener is ''expecting'' this trope to be in effect, and the fourth repetition surprises them, possibly even making them a little uncomfortable. In fact, they might think they misheard, until the fifth repetition underlines it. It might even be somewhat discomfiting. Which makes sense, as the singer is certainly disturbed.
-->You just have to see her
-->You just have to see her
-->You just have to see her
-->[[SubvertedTrope You just have to see her]]
-->You just have to see her
-->You know that she'll break you in two
* ''Party In The USA'' by MileyCyrus:
-->That's when the taxi man turned on the radio
-->And a Jay-Z song was on
-->And the Jay-Z song was on
-->And the Jay-Z song was on
* [[http://www.youtube.com/watch?v=wtiQ3X6-Q2w&feature=related Scherzo]] [[http://www.youtube.com/watch?v=hPKzQhvI3_U&feature=related Tarantella]] -- It's ALL in triplet patterns.
* Indian Classical music (both Carnatic and Hindustani) has a huge array of compositions in meters with 3 counts per beat, which are often light and lilting numbers, though some are also heavy numbers. In rhythmic finales, it is customary to repeat the ending sequences three times, with optional variations.
** Folk music in India just '''adores''' triad rhythms.
* Several great concertos have ''three movements''. Creator/JSBach wrote six (2x3) Brandenburg Concerti. They are usually issued (whether as two separate [=CDs=] or as a double CD) with nos. 1-3 on one disc and nos. 4-6 on the other. The Third (perhaps due at least partly to the influence of Creator/WendyCarlos) is often considered to be one of Bach's greatest hits.
* The tone poem "The Golden Spinning Wheel" by Antonín Dvořák has a slow section that repeats the same music three times with subtle differences in phrasing and harmonic shifts. Naturally, it's based on a fairy tale.
* Music/DeLaSoul's "The Magic Number" riffs on... you guessed it... 3.
* Third use twist in RoyZimmerman's satire number "Socialist!", a TakeThat to the louder, dumber chunk of the American political right:
-->(in a bad vaguely-Southern accent) "You drive here on a public street? ''Socialist.'' You go to a public school? ''Socialist.'' You ever been in a public library? ...[[BookDumb Why?]]"

* In ''Theatre/AnimalCrackers'', after the song "Hooray for Captain Spaulding," Spaulding tries three times to give his welcoming address. The first two times, the chorus interrupts him with encores of "Hooray for Captain Spaulding." He interrupts his third attempt by singing it himself, then saying: "Well, somebody's got to do it."
* Erronius in ''Theatre/AFunnyThingHappenedOnTheWayToTheForum'' is told to walk seven times around the seven hills of Rome. The first two times he re-enters and walks sloooooowly across the stage as the rest of the cast watch silently. The third time he gets run over during a chase scene.
* From ''{{Rent}}'': "Say something. Anything." "Test, one, two, three - " "Anything but that."
* One of the musical themes in ''Theatre/TheMagicFlute'', labeled "The Triple Chord," is three voicings of a B-flat major chord, each one repeated three times in a short-long-long pattern.
* In ''The Mikado'', Pooh-Bah gives a "toast with three times three" repeating the phrase "long life to you" three times. Most people who play the role ham the third time up even more than is called for in the script (which is quite a bit.)
** Also from ''The Mikado'':
--->"One little maid is a bride, Yum-Yum,\\
Two little maids in attendance come,\\
Three little maids is the total sum,\\
Three little maids from school."
* In ''Theatre/SweeneyToddTheDemonBarberOfFleetStreet'', Todd teaches Mrs. Lovett a pound-three-times signal.
* In ''IntoTheWoods'', the Witch tells the Baker and his wife that they must bring her the items "before the chime of midnight in three days time" in order to break the spell.
* In the Creator/CirqueDuSoleil show ''Theatre/TheBeatlesLOVE'' a white VW bug appears several times. The third (or possibly [[FourIsDeath fourth]]) and final time [[spoiler: it smashes into a woman (who represents John Lennon's mother, who died in a car crash); the car bursts apart]].
* In ''Theatre/TheMusicMan'', the piano lesson scene begins with Amaryllis practicing the same passage three times, always ending on the same wrong note. Mrs. Paroo plays the right note for Amaryllis the first two times, and Marian enters to correct her third try.
* Skynyrd's "Gimme Three Steps"

[[folder:Myth, Legend and Religion]]
* Shows up all the time in religion:
** Christianity does this so much that 333 is used by people being ostentatiously Christian:
*** Literature/TheBible: Three days pass between Jesus dying and returning to Earth. In fact, whenever a number is mentioned in the Bible, it's usually 3, 7, 12, or 40.
*** "Jesus answered (Peter), Wilt thou lay down thy life for my sake? Verily, verily, I say unto thee, The cock shall not crow, till thou hast denied me thrice". - John 13:38
**** And then, after his resurrection, Jesus asks Peter three times if he loves him, extracting from Peter a promise to continue his work three times before he leaves him alone. This is often regarded as a symbolic reversal of Peter's thrice-denial of Jesus before his death. Also cf. the Fight Club example above.
*** The three Christian virtues: Faith, Hope, Love/Charity (Charity refers to ''agape'' or selfless love, as opposed to Eros as self-gratifying and/or sexual love).
*** Also, although the only reference to this event in the Gospels states that {{Jesus}} was placed "in a manger, because there was no room for them at the inn", Nativity plays tend to show two innkeepers telling Mary and Joseph to go elsewhere because all the rooms are taken -- before a third also says that there are no rooms, but that Mary and Joseph may use the stable, since Mary is pregnant.
*** The Gospel of Matthew, the only one that mentions the Wise Men or Magi, doesn't specifically state that there were three of them, only that they came "from the East". The gospel does mention that they presented Jesus with three symbolic gifts; gold (signifying Christ the King), frankincense (representing Jesus' divinity) and myrrh (an embalming incense, indicating that Jesus would die to save God's people).
*** When Jesus fasted in the desert, he was tempted three times by the Devil; 1) Turn the stones into bread, 2) Throw yourself from this cliff and let God save you, and 3) swear loyalty to me and the kingdoms of the world will be yours.
*** The Trinity: Father, Son and Holy Spirit. The first sometimes is represented by an eye set in a triangle. (Although there are also [[http://en.wikipedia.org/wiki/Nontrinitarianism nontrinitarian]] Christians).
*** The ''Kyrie'': Lord have mercy. Christ have mercy. Lord have mercy upon us.
** Examples from the Hebrew Bible or Old Testament:
*** The three sons of Adam and Eve: Cain, Abel, and Seth.
*** The three sons of Noah: Shem, Yaphet, and Ham.
*** The three patriarchs, also mentioned in the formula: The God of Abraham, Isaac, and Jacob.
*** The three kings of the united Israelite kingdom: Saul, David, and Solomon.
*** Jonah was in the belly of the fish for three days and three nights.
* Wicca has the "rule of 3", meaning (depending on who you ask) that everything you send out into the world either returns to you thrice as strong in consequence, or comes back to you on the astral, mental and physical planes. Furthermore, when casting a Sacred Circle in Wicca, the typical procedure is to walk around the circle three times and say the incantation three times. (In some practices anyway.)
* This pops up occasionally in Judaism, though generally not as centrally as in Wicca:
** The world is sustained by worship, study and deeds of lovingkindness.
*** Also known as love of Hashem, love of Torah, and love for your fellow human being.
** These temper judgment's severe decree: prayer, repentance and charity.
** In {{Kabbalah}}, the TreeOfLife has 3 pillars: The pillar of rigor, the pillar of mercy, the pillar of balance.
* Examples from SpeakOfTheDevil include Pazuzu and Bloody Mary.
* Some religions divide reality into Heaven, Earth and Hell.
** For the Norse, the universe was divided into nine (thrice three) worlds on three levels: the upper level had Alfheim (elves), Asgard (war gods and those who died in battle), and Vanaheim (fertility gods). The middle level has Midgard (humans), Jotunheim (giants) and Svartalfheim (dark elves/dwarfes), The [[HailfirePeaks bottom level]] has Helheim (those who died of disease), Nifleheim (land of ice and fog) and Muspell (fire demons).
*** There are a lot more examples in Norse mythology, mayby since as mentioned above thrice three is nine which is the holy ArcNumber of Norse Mythology:
**** The third genreation of Gods created the world, those are three (Odin, Vili and Ve).
**** Three gods created humans: Odin, Hönir and Lodur (Loki).
**** There are three norns.
**** Yggdrasil has three roots.
**** Thor has three children: Thrud, Magni & Modi
**** Loki has three children with Angerboda: Hel, Fenrir & Jörmungandr.
**** The Fimbulwinter will last for three winters without summer in between.
**** The wolf Fenrir was bound by three fetters: Loeding, Drómi, and Gleipnir.
**** In the poem Völuspá, the description of Garmr's howl is repeated three times.
**** Freyr anf Freyja has three magical items each.
**** Three of Odin's sons shall live after Ragnarök: Vidar [[spoiler: Baldur & Hödr]].
** UsefulNotes/{{Mormonism}} recognizes three heavens/kingdoms of glory after the Final Judgement: The Celestial Kingdom (itself divided into three kingdoms), the Terrestrial Kingdom, and the Telestial Kingdom.
* Subverted in [[NativeAmericanMythology Lakota mythology]]: Three is the number of imperfection, while four, far from its [[FourIsDeath other implications]], is the number of perfection.
* Hinduism : Three gunas (modes) of nature : goodness, passion and ignorance.
** ''Literature/BhagavadGita'': Lust, Anger and Greed -- three gates to hell. Also gross, subtle and spiritual existence.
* In one of the variants of the ArthurianLegend, Arthur has to ask whomever is present at the time (usually Bedivere) three times to return his sword to the Lady of the Lake

* [[Creator/MidwayGames Bally]]'s ''Pinball/DrDude'' requires the player to get the three Elements of Coolness (a Magnetic Personality, the Heart of Rock and Roll, and the Gift of Gab) three times before starting multiball.
* Two examples in ''Pinball/JunkYard'':
** "Save the Girl" requires you to hit Spike three times.
** Hitting the TimeMachine and pressing both flipper buttons three times when the clock shows 3:33 starts a [[EasterEgg secret mode]].
* One of the tasks in ''Pinball/ThePartyZone'' is to "Eat, Drink, & B. Merry".

[[folder:Professional Wrestling]]
* Wrestling stables, like NWO, The Shield, DX etc often are (or begin as) a trio.

* The character of Errol in TheBBC series ''FifteenStoreysHigh'' always answers a question truthfully, if asked it three times.

[[folder:Tabletop Games]]
* Rather than using it as a trope, the ''TabletopGame/DungeonsAndDragons'' setting ''Planescape'' and its video game spinoff ''PlanescapeTorment'' explicitly mention the RuleOfThree in-story as a principle with cosmic validity. (''Everything'' involves the number 3 somehow. There are even three cosmic principles.) Since the world(s) of Planescape are [[ClapYourHandsIfYouBelieve shaped by belief]], it's not impossible that that's true. If enough people believe it's nonsense, it won't be...
** There are enough {{Flat Earth Atheist}}s like Morte to disbelieve it, yet the rule persists for the reason that Morte gives, that minds have a tendency to create patterns. This tendency is perhaps stronger than belief, which is why the rule can be widely debunked yet the evidence of it still appears.
** One NPC adopts this principle and runs with it clear off the field. Calling himself "Rule of Three," he's an information broker who requires things in sets of three as his payment, and gives three true answers to any question. As a second character is known to associate with another of the three cosmic principles, it's suspected a third is out there somewhere as well, because... well, RuleOfThree.
* In the Living {{Greyhawk}} campaign, a magic item spoke three prophesies of destruction that the players could attempt to prevent.
** Almost subverted in the fact that the original editor was only going to let the item speak twice, because the Big Bad had already received the first prophesy. But, then a change in editors mandated that [[ViewersAreMorons the audience is stupid]].
* White Wolf's Storyteller/Storytelling systems use the RuleOfThree extensively: three sets of three attributes, usually physical (strength, dexterity, stamina), social (charisma, manipulation, appearance), and mental (intelligence, wits, perception), and three kinds of abilities (talents, skills and knowledges). The rest can vary depending of the individual games, but the RuleOfThree is also prominent in several:
** In the ''TabletopGame/NewWorldOfDarkness'' the three attribute groups are divided in another way, each with three traits in it like the main groups; power (strength, intelligence, and presence), finesse (dexterity, wits, manipulation), and resistance (stamina, resolve, composure).
*** The demo for ''TabletopGame/ChangelingTheLost'' has Blue Jenny, who [[spoiler: if her real name is spoken in her presence three times, her Keeper will be summoned. Hence the reason for her getting the motley's help retrieving what's actually her diary]].
*** In ''TabletopGame/MageTheAwakening'', mage tradition dictates that a mage owes three favours to any mage who acquires their soul stone (a piece of their soul distilled into physical form for power).
** In ''TabletopGame/OldWorldOfDarkness'':
*** In ''TabletopGame/VampireTheMasquerade'', each Clan has three favored Disciplines its members can learn more easily, and drinking the blood of one vampire three times, on three different nights, gives this vampire power over the drinker. Also, vampires have three virtues to fight their three different flavors of frenzy.
*** In ''TabletopGame/MageTheAscension'', the Resonance of a mage's magick is defined by three types of specific resonances: Dynamic, Entropic, and Static. This is linked to the cosmology of the Old World of Darkness (see below). Relatedly, they face three kinds of main foes: the Technocrats (linked to Stasis), the Nephandi (liked to Entropy) and the Marauders (linked to Dynamism).
*** In ''TabletopGame/ChangelingTheDreaming'', changelings can be of three general ages: childlings, wilders, and grumps. And since the setting is about mythos and fairytales, there are MANY occurrences of the RuleOfThree.
*** ''TabletopGame/WerewolfTheApocalypse'' introduced the cosmology detailed below, and also gives players three major traits that determine their werewolf character's place in the Garou Nation and what Gifts they can learn: tribe, auspice, and breed. Werewolves, and most other shapeshifters, have three breeds.
*** Over the course of the various editions of the various games, a somewhat unified and coherent cosmology emerged, with three major entities or forces: the destructive Wyrm, the creative Wyld, and the stabilizing Weaver, none of which are inherently evil (all in all, it's similar to the hinduist Trimurti). They play a major role in ''TabletopGame/WerewolfTheApocalypse'' (where they first appeared) and ''TabletopGame/MageTheAscension'' (the Tradition mages that players usually roleplay are, in a way, balancing the three against three kinds of extremists). Supplements that delved into the deeper aspects of the Triat (the common name used for the trinity of Wyrm, Weaver, and Wyld) would reveal that each of the three has three more specific aspects. The most well-known are the aspects of the Wyrm known as the [[NamesToRunAwayFromReallyFast Eater-of-Souls, the Beast-of-War, and the Defiler]].
** The ''TabletopGame/TrinityUniverse'' setting. Three games: [[TwoFistedTales Adventure!]], [[SuperHero Aberrant]], and [[AfterTheEnd Aeon]] (later renamed [[DisneyOwnsThisTrope Trinity]]). Three "classes" of character: paramorphs (or [[BadassNormal Daredevils]]), eximorphs (or [[SuperHero Stalwarts]]) and psychomorphs (or [[PsychicPowers Mesmerists]]). The actual mechanics show the same divisions as other Storyteller systems. Each stat doesn't have three skills though. But oh well.
** ''TabletopGame/{{Exalted}}'', while using almost the same system as the ''Old World of Darkness'', subverts expectations by running its setting on the number five instead. Indeed, that the Lunar Exalted use the RuleOfThree anyway makes them stick out incongruously, though that is justified: they ''used'' to have five castes and so forth, but their long exposure to the Wyld ([[PrimordialChaos unshapable chaos]] [[RealityIsOutToLunch outside Creation]]) has thrown them out of whack.
* ''TabletopGame/MagicTheGathering'' blocks are released in three sets. Furthermore, Wizards of the Coast have their own "rule of three" - the first set establishes core concepts and mechanics, the second set develops them further, and the third introduces some new twist. For example, the third set of the artifact-based block ''Mirrodin'' presented effects that produced or used all five colors of mana, the third set of the legendary-based block ''Kamigawa'' gave the Epic spells and rewarded large hand sizes, and the third set of the land-based block ''Zendikar'' introduced the massive and colorless Eldrazi.
** The "One for Three" cycle of cards from the first core sets that cost one mana of it's color's mana type. Grating the caster 3 of something related to the color (Damage, Life, or most famously, card draw).
** The "charm" cycle. One card does one of three things.
** Effects are often printed in three-card "vertical cycles": a common card with a weak version of an effect, an uncommon card with a stronger version and a rare card with the strongest version. For example, the Apocalypse expansion included [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=26806 Bloodfire Dwarf]] at common, [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=28806 Bloodfire Kavu]] at uncommon and [[http://gatherer.wizards.com/Pages/Card/Details.aspx?multiverseid=28807 Bloodfire Colossus]] at rare.
* ''TabletopGame/DungeonsAndDragons'' for special defences: Fortitude, Reflex, Will.
** The physical stats: Strength, Dexterity, Constitution. The mental stats: Intelligence, Wisdom, Charisma.
** The alignments: Lawful, Neutral, Chaotic, and Good, Neutral, Evil. Put together into the alignment spectrum and there are nine options.
*** Though sometimes averted -- the neutral alignments are not alignments ''in the same way'' as Lawful, Chaotic, Good, and Evil -- beings can be made of [[MadeOfEvil Evil]], [[MadeOfGood Good]], Law or Chaos, but not of Neutrality. Neutral is the absence of other alignments, which may be due to philosophies of balance (and indeed there are beings all about Balance), but often isn't.
* ''DogsInTheVineyard'' is geared for groups of about three [=PCs=], and Three In Authority is one of the most powerful rituals against demons (a two-PC group can pull it off with help from the NPC town elder).
* ''TabletopGame/InNomine'' has the three Realms, Corporeal, Ethereal and Celestial, which each have a type of Force associated with them, also there are three main types of supernatural beings, angels, demons, and ethereals.
* In Dungeon, a boardgame published by TSR and developed by, among others, Gary Gygax, to open a door, you have to roll for it three times. After the third time, you can just go through.
* Invoked in ''TabletopGame/UnknownArmies''. Threes tend to come up a lot in its PostModernMagic, especially in ritual magic. [[ArcNumber 333]] in particular has great mystical significance [[spoiler: because it's the number of seats in the Invisible Clergy, the ascended mortals/gods that personify humanity]].

* ''Theatre/CyranoDeBergerac'': This trope is combined with and DepartmentOfRedundancyDepartment: The gratuitous repetition of a question or a gesture for three or more times are shown in the play:
** PlayedForLaughs: At Act I Montfleury tries to say his lines four times, Cyrano orders him to disappear when Cyrano clap his hands the third time, the bore asks Cyrano three times if he has a protector. Lampshaded by Cyrano when he does not answer a three time:
--> '''Cyrano''' ''(irritated):'' No, I have told you twice! Must I repeat?
** PlayedForDrama: At Act II, Cyrano asks three times Roxana what she would do if Christian is not as eloquent as fair, she answers two times that being fair, he has to be eloquent, and the third time she invokes DrivenToSuicide. At Act IV, Cyrano asks Roxane if she would love Christian, even if he would be ugly, three times. She answered yes every time.
* [[Creator/WilliamShakespeare Shakespearean]] examples:
** In ''Theatre/JuliusCaesar'', Marc Anthony speaks at Caesar's funeral:
-->You all did see that on the Lupercal\\
I thrice presented him a kingly crown,\\
Which he did thrice refuse: was this ambition?
** During this speech, he also says "Brutus is an honorable man" three times. A fourth time he just says, "And sure he is an honorable man", by which time he's in full SarcasmMode.
** Theatre/KingLear has three daughters to whom he intends to leave a third of his kingdom each. (However, he gets annoyed with the third one and ends up giving his kingdom to the other two).
** When [[spoiler:Mercutio]] is fatally stabbed in ''Theatre/RomeoAndJuliet'', he curses the Montagues and Capulets three times ("A plague on both your houses!") before dying, thus ensuring that the curse comes true.
** ''Theatre/TheMerchantOfVenice'' has three caskets, of which the third chosen is successful.
** ''Theatre/{{Macbeth}}'' alone contains too many examples to count, most coming from the three witches.
** [[Literature/{{Discworld}} And therefore]] also the amount Witches like to assemble in, 'cause two is just an argument.

[[folder:Video Games]]
* MANY video games (especially {{Platform Game}}s and {{Shoot Em Up}}s) give you three lives before it's GameOver for you.
** There's also the very common three-hit combo attack.
** Also, the three-star rating.
* ''The Legend of Zelda'' has the supreme Triforce: Power, Wisdom, Courage. Also the three Goddesses that go with it: Din, Nayru, and Farore.
** Also [[VideoGame/TheLegendOfZeldaCDiGames three CDi games]].
** In general, Zelda games are littered with Threes: There are [[VideoGame/TheLegendOfZeldaOcarinaOfTime three Sacred Stones, three magical spells, three elemental arrows]], [[VideoGame/TheLegendOfZeldaTwilightPrincess three Provinces covered in twilight, three Fused Shadows and Mirror Shards to collect]] ([[FreeSamplePlotCoupon the fourth Shadow is already on Midna's hands, and the fourth Shard is still in its place]]), [[VideoGame/TheLegendOfZeldaPhantomHourglass three fairies to save, three metals from which the Phantom Sword is formed]], [[VideoGame/TheLegendOfZeldaSkywardSword three surface regions, three Sacred Flames, three Dragons and the aforementioned three fragments of the Triforce]].
** Several bosses will go down after three sets of attacks from Link. [[VideoGame/TheLegendOfZeldaOcarinaOfTime King Dodongo]], for instance, goes down after three bombs.
** Link begins every game with 3 hearts.[[note]]Except for ''VideoGame/TheLegendOfZeldaSkywardSword'', where he starts with six; and ''VideoGame/ZeldaIITheAdventureOfLink'', where his rectangle-based meter starts with four.[[/note]]
** [[VideoGame/TheLegendOfZeldaMajorasMask Three days to save Termina]]. Each temple also had three boss fights: one to obtain the Hero's Bow or elemental arrow (of which there are three), one to obtain the Boss Key, and one to free the giant and end whatever curse had invaded the land. And, of course, the final boss is fought in three stages.
** The ''VideoGame/TheLegendOfZeldaOracleGames'' were supposed to be three (the third game would have featured Farore), but the link system between three games was too complicated to implement, [[DummiedOut so...]]
** Ever since ''VideoGame/TheLegendOfZeldaALinkToThePast'', there is almost always a twist that comes after three dungeons/{{MacGuffin}}s. Also since ''A Link to the Past'', each dungeon contains three artifacts: a Map, a Compass, and a Big Key (which leads to a treasure usually needed to solve the dungeon).
* ''SuperMarioBros'': Almost all bosses in non-RPG Mario games contain some relevance to three, be it the amount of hits it takes, or the phases it goes through, or a combination thereof.
** There are also three parts to the [[VideoGame/MarioAndLuigiBowsersInsideStory Miracle Toadley Cure]].
** In ''VideoGame/SuperPaperMario'', World 7 contains many mythological references, many of which invoke the Rule of Three.
** Each world in ''VideoGame/SuperMarioBros2'' has three levels, except the last world (which only has two).
** ''VideoGame/SuperMarioBros3'' has threes hidden in various maps. One is three threes of coins in World 5-1. Also, the king of World 3 lives in Kyoto (where Nintendo's headquarters are).
* The Three Trials in ''VideoGame/MonkeyIsland''.
** In ''VideoGame/TheCurseOfMonkeyIsland'', Guybrush is told by the Voodoo Lady that he needs three things [[spoiler: to get to Blood Island:]] A map, a ship, and a crew.
* ''VideoGame/DragonAgeOrigins'' has three dragons. The [[BigBad Archdemon]] is the final boss; [[VoluntaryShapeshifting Flemeth]] and the High Dragon are optional.
* ''Franchise/{{Ultima}}'':
** The Virtues were organized in overlapping threes; three Virtues are based directly on one of three Principles, three were based on a combination of two Principles to form another trinity, and one Virtue is based on all three Principles. One Virtue stood as a Unity of the three groups of three.
** The games themselves are organized into three trilogies. The first three are the Age of Darkness, when most of the land is filled with monsters and dominated by the evil Triad. The second three are the Age of Enlightenment, as Lord British cultivates civilization and an ethical foundation based on the Virtues; in this arc the Codex of Infinite Wisdom is first brought from the Void, and then returned to share with another civilization. The final trilogy, involving the Avatar's nemesis the Guardian, is actually spread over five chapters, including ''[[VideoGame/UltimaVIIPartII VII Part 2]]'' and VideoGame/UltimaUnderworld II.
* In the ''VideoGame/RatchetAndClank'' 'series:
** The first game, ''[[VideoGame/RatchetAndClank2002 Ratchet & Clank]]'':
*** Most of the planets have three paths, or two paths and a special area (gravity boots, hoverboard race, etc.)
*** The final boss fight has three phases.
** ''RatchetAndClankGoingCommando''
*** The Thug Leader of Thugs-4-Less must be defeated three times.
*** The final boss fight at the end of the game has three phases, but can be shorter if the player applies MoreDakka.
** Dr. Nefarious at the end of ''RatchetAndClankUpYourArsenal''.
* PlanescapeTorment, as explained above under TabletopRPG.
* Max of ''SamAndMax'' correctly guesses the number of prophecies the Sea Chimps have thanks to the series' use of this trope, with heavy LampshadeHanging.
** An earlier example in Episode 103 where the duo is initially given 2 tasks to complete for the Toy Mafia. Immediately after Chuckles says "two things you must do for us." another mafia member alerts him of a new problem that has arisen, causing Chuckles to correct himself and gives the heroes three tasks.
* ''Franchise/{{Pokemon}}'' has this in spades. Generation I has Articuno, Zapdos, and Moltres. The second generation has Raikou, Entei, and Suicune. Generation III has Regirock, Regice, and Registeel, as well as Kyogre, Groudon, and Rayquaza. Generation IV gives us Dialga, Palkia, and Giratina as a trio, as well as Azelf, Uxie, and Mesprit. The fifth generation has ''three'' trios: The Tao, Kami and Musketeer trios? The Musketeers have [[ShoutOut Keldeo]] throwing them off-- it's a trio if we're counting the elemental monkeys, though. With the sixth generation around the corner, it's practically guaranteed that there will be at least one more trio.
** The maximum number of evolutionary stages for a single Pokémon is three (unless it branches, such as Eevee, who started out with three evolved forms; it now has eight.).
** By the end of each generation, there are three non-remake games: Red, Blue, and Yellow in Generation I (in Japan, Yellow is the TrilogyCreep, because there's already Red, Green and Blue), Gold, Silver, and Crystal in Generation II; Ruby, Sapphire, and Emerald in Generation III; and Diamond, Pearl, and Platinum in Generation IV. Though with Generation V, they've finally broken this chain by creating Black 2 and White 2.
** There's also three starters in all games except for Yellow.
* ''VideoGame/CommanderKeen'' started as a trilogy, had another three episodes (a duology and a stand-alone adventure), and was going to have another trilogy before it got cancelled.
* ''VideoGame/Wolfenstein3D'', ''Videogame/{{Doom}}'' and ''{{Heretic}}'' each started out with three episodes. The latter two each have episodes consisting of nine (three squared) missions.
* In ''VideoGame/QuakeIIIArena'' the Quad damage powerup, contrary to what the name would suggest, multiplies your damage by three.
* In ''VideoGame/{{Scribblenauts}}'', if you feed an animal something three times, it goes to sleep.
* In ''VideoGame/{{Nintendogs}}'', you must say the name of a trick clearly 3 times for your dog to learn it.
* Some of the earlier games for the SegaMasterSystem (such as "Safari Hunt", "Ghost House" or "My Hero") only had three levels each. The "fourth" level was usually the repeat of the first, but with stronger or faster enemies, the "fifth" level was the repeat of the second level, and so on, with the difficulty upped every time the three levels were completed.
* The first ''VideoGame/SonicTheHedgehog'' game and ''VideoGame/SonicTheHedgehogCD'' had three acts per zone, and so did the five Sonic games released on the Game Gear.
** In newer games, there are usually teams of three, shown in VideoGame/SonicAdventure2 with the Heroes (Sonic, Knuckles, and Tails) versus the Dark (Shadow, Rouge and Eggman). Further built upon with VideoGame/SonicHeroes, where each team is a team of three: Team Sonic, Team Rose, Team Chaotix, and Team Dark (which is Shadow and Rogue again, but with E-123 Omega). Also another example is that Metal Sonic has three forms, his normal "hedgehog" form, then his Metal Madness (a gigantic metal dragon-ish form) and his final form, Metal Overlord.
* ''{{Metroid}}'' is fond of this as well. Particularly the ''Prime'' sub-series, with three Temples in ''Echoes'' (and each of them requiring 3 Keys for full access), 3 Phazon-infested planets in ''Corruption'', and the 3 alternate beams and 3 alternate visors in each game.
* ''SwordOfTheStars'' has three classes of FTL-capable starships, with each being thrice the length of the previous.
* ''JurassicParkTrespasser'' has three different tribes of raptors. Also, the neurotoxin dart rifle in one level holds exactly three shots, which, if you take it all the way to the end of the level with you, is exactly how many shots to the head it needs to kill the T-Rex waiting for you.
* In VisualNovel/AceAttorney series, a trial in the courthouse for a particular case can only last up to a maximum of 3 times before the judge passes the final verdict to the accused. In the "3rd" game "Trials and tribulations", the character Dahlia Hawthorne appeared exactly 3 times in the courthouse for 3 different cases as a witness before she is "permanently retired" for good. The main protagonist also faced Godot in a courthouse battle up to 3 cases in total. Lastly, Phoenix Wright was featured as the protagonist for 3 games in the VisualNovel/AceAttorney series.
* ''StarCraft'' has three playable races.
* ''HeavyWeapon'' gives you three lives per level, allows you to have a maximum of three [[SmartBomb Nukes]] and three levels of DeflectorShields, and you can upgrade your equipment to a maximum of three levels.
* ''Videogame/{{Portal 2}}'' combines this with DepartmentOfRedundancyDepartment:
--> '''[=GLaDOS=]''': Well, this is the part where he kills us.
--> '''[[spoiler:Wheatley]]''': 'Ello! This is the part where I kill you!
--> Chapter title shown: The Part Where He Kills You.
** There's also the achievement, but it doesn't appear on subsequent playthroughs, making it three.
* ''VideoGame/{{Shatterhand}}'' requires three alpha/beta powerups to activate the robot companions.
* In the ''Bloodmoon'' expansion to ''VideoGame/TheElderScrollsIIIMorrowind'', you have to kill spriggans three times before they stay dead. Thankfully they don't retain this HealingFactor in ''[[VideoGame/TheElderScrollsIVOblivion Oblivion]]'' or ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]''. Instead, in ''Oblivion'' they ''[[BearsAreBadNews summon bears]]'', and in ''Skyrim'', they can heal themselves three times (falling back into the trope).
** Morrowind also uses the FighterMageThief division with three of its categories of factions: there are three vampire clans in Vvardenfell (the Quarra as the physical-focusing, the Aundae as the magic-focusing and the Berne as the stealth-focusing), three Imperial Guilds (the Fighters', the Mages' and the Thieves') and three Great Houses with a significant presence in Vvardenfell (Redoran as the warriors, Telvanni as the sorcerers, Hlaalu as the sneaky merchants). And then there is the fact that the local religion centres around three gods (with a corresponding set of three 'Good Daedra'), who outright are referred to as the Three in some dialogues... suffice to say that three recurs a lot in ''Morrowind''.
* ''JetForceGemini'': Three playable characters, each of them visits three planets and, in the third of them, they face a boss. They then go to Mizar's Palace for a first-time confrontation against the BigBad. Afterwards, the trope is averted for the most part.
* In ''VideoGame/BlackAndWhite'', the Sailors' Quest involves the aforementioned sailors asking for three things by song: Wood, grain, and meat.
* ''Franchise/FinalFantasy''
** Some games like (''[[VideoGame/FinalFantasyVII VII]]'', ''[[VideoGame/FinalFantasyVIII VIII]]'' and ''[[VideoGame/FinalFantasyX2 X2]]'') give you three people per party.
*** ''VideoGame/FinalFantasyIX'' gives three early bosses called The Black Waltz, essentially three powerful Black Mages. After the third Waltz is defeated, Zidane comments that the name "Waltz" indicates that there won't be any more of them.
** Notably, every game since ''[[VideoGame/FinalFantasyIV IV]]'' has had exactly three female characters in the playable cast, regardless of the total cast size. This is explicitly referred to as the 'Three Females Rule' in Squaresoft fan circles. Note that later games have gravitated toward a total playable cast size of 6, thus equalizing the gender balance while still following the rule. Usually, one female is [[SugarAndIcePersonality broody and aloof]], the other is [[GenkiGirl young and energetic]], and the third is usually somewhere in between.
* ''VideoGame/KingdomHearts'' generally gives you a three-person party of Sora, Donald and Goofy (Donald and Goofy can be replaced by other playable characters).
** In the ''Disney/OneHundredAndOneDalmatians'' side-quest in the first ''Kingdom Hearts'' game, 99 Dalmation puppies are found throughout the game hidden in chests. There are always three puppies in each chest, for a total of 33 chests.
* ''VideoGame/WorldOfWarcraft'':
** Three talent trees/specializations
*** Mists of Pandaria will buck the trend and give Druids four specializations
** Three roles: Tank, Healer, Damage
** Three kinds of pets: Cunning, Tenacity, Ferocity
** Many, many 5-player instances feature three boss fights.
*** And if their entrances don't have a singular quest giver (who usually comes with two bodyguards), it's usually a group of three.
* ''VideoGame/BlazBlue'' Each character's story branches(Except the true branch) have [[MultipleEndings three endings]]: True ending, Alternate Ending, and a Gag Reel. Also, there's three main characters(Ragna, Jin, and Noel)
* Many DrivingGames, particularly those from or styled after the MarioKart series, use three laps as the standard duration of a race, occasionally wavering only if the track is very long or very short.
** The online driving game ''[[Disney/WreckItRalph Sugar Rush Speedway]]'' has three types of course; it has three championship rounds, one for each course type, plus a final championship round featuring all three types in each course; each championship has three courses, and hence three races; the third and fourth have three-lap races; and initially, three racers are unlocked.
* ''[[VideoGame/{{Myst}} Myst III: Exile]]'' heavily uses this trope as much as ''Riven'' used RuleOfFive. There are 3 Lesson Ages (excluding the final one), which internally hold 3 sections, puzzles, or environments, colors, symbols, and more.
* When a game has colour-coded doors which unlock with the matching key, there are nearly always three colours (usually red, yellow and blue, although in ''{{VideoGame/Heretic}}'' it's yellow, green and blue).

[[folder:Web Comics]]
* ''Webcomic/StatisticalFact'' often combines the rule of threes with statistics to spotlight a humorous anomaly. See [[http://statisticalfact.com/sf/sedentary-stalker/ this comic]] for an example.
* ''TriquetraCats'' features three sisters taking up the mantle and war that their deceased mother was unable to finish.
* From ''AMiracleOfScience'': Benjamin mentions that he spends much of his rare days off listening to classical music; he gives Bach, Prokofiev, and ''Music/TheBeatles'' as examples. (The webcomic's artist expounds on the Rule in his [[http://project-apollo.net/mos/mos084.html commentary]].
* In ''Webcomic/EightBitTheater'' [[spoiler: Onrac is destroyed because of Sarda and Black Mage three times.]]
-->''Where lightning can't strike thrice!''
* ''Webcomic/MSPaintAdventures'' has this during the Problem Sleuth story. Three detectives, three dames, three gentlemen, three faces for DMK. Threes are everywhere in that story.
** Homestuck, on the other hand, has things coming in 4s or 12s, to match the ArcNumbers.
* The latter entries in Webcomic/{{Bug|Martini}} tend to have one panel of set-up, followed by three more panels, each with a mini joke within them. "[[http://www.bugcomic.com/comics/random-thoughts/ Random Thoughts]]" is a good example of this trope in action.
* ''Webcomic/BobAndGeorge'' [[http://www.bobandgeorge.com/archives/001105c With commentary explaining why two failures and a success make a good pattern.]] [[http://www.bobandgeorge.com/archives/001113c And again here.]] In fact, if you keep reading the commentaries, Dave comes back to this a lot, counting how many repetitions of a given gag he uses.
** Also, three strips in a row of thought bubbles when carrying out a plan hatched by [[DumbassHasAPoint Bass]], all of which ended in them questioning the wisdom of taking tactical advice from the resident [[TheDitz ditz]]. Summarized version:
--->'''Protoman''': I suppose they're right, I can't take Mynd on my own...when did we start listening to Bass?\\
'''Roll''': Shame I never got to that relationship storyline...wait, when did we start listening to Bass? We're all going to die.\\
'''Bass''': [pause] I like ice cream. [Pause] When did they start listening to ''me''?
* ''Webcomic/{{Derelict}}'' The main character ponders them, related to survival: three minutes without air, three days without water, three months without food. Then she wonders if she got it right. (Not exactly: three weeks without food is the rule.)
* Referred to by name in ZebraGirl, by Sam (being Dangerously Genre Savvy is his thing) as an explanation for why he smacked their new ally three times: once for trying to attack him, once for not immediately joining his side, and once for talking with his mouth full.
* In ''TalesOfTheQuestor'', [[http://www.rhjunior.com/totq/00532.html Quentyn asks for each boon three times, and the fae lord grants it -- the third time is when it kicks into effect.]]
* In ''RustyAndCo'', [[http://rustyandco.com/comic/level-6-42/ Madeline keeps cutting her head off, and the vampire puts it back on, getting seriously annoyed by the third.]]
* In ''{{Webcomic/Freefall}}'', [[http://freefall.purrsia.com/ff2300/fc02283.htm Clippy realizes that when all three plans have failed, they were foiled.]]
* In ''Webcomic/GirlGenius'', [[http://girlgeniuscomic.livejournal.com/74654.html the third time]] Zola needs to be rescued when Agatha wants to talk to Gil, Agatha rescues her.
** Also Jagers only get 3 tries to steal Old Man Death's hat.
** In the heart of Castle Heterodyne, there are three lights.
*** When Agatha first speaks to the Castle, [[http://www.girlgeniusonline.com/comic.php?date=20071012 the first light comes on.]]
*** When she proves her identity as a true Heterodyne, [[http://www.girlgeniusonline.com/comic.php?date=20080820 the second light comes on.]]
*** And when she restores power to the Castle (in yet another MomentOfAwesome) ... the '''[[http://www.girlgeniusonline.com/comic.php?date=20121224 THIRD LIGHT!]]'''
* There's a webcomic named ''[[http://www.drunkduck.com/Rule_Of_Three Rule Of Three]]'' which centers around three female friends.

[[folder:Web Original]]
* The YoutubePoop video ''[[http://www.youtube.com/watch?v=FgRUTAlu1-A Meet the Artillery]]'' by electricthecheese does this by having an overly-long-gag of [[VideoGame/TeamFortress2 Heavy Weapons Guy]] saying "GUN." After a while, there is a long, unedited period, and at the most unexpected moment, the Heavy makes a loud, virus-sounding noise and one of the CareBears inexplicably pops in. Also, the Engineer introduces himself several times, and then the Heavy and Sniper introduce themselves as engineers as well.
* Used straight, then lampshaded in ''WebOriginal/LifeInAGame''. When Lollerskates assumes his [[ClippedWingAngel final form]] during his [[http://www.lifeinagame.com/pages/episode62.html Final Showdown]] with the heroes, all it takes is three shots to his [[AttackItsWeakPoint incredibly obvious weakpoint]] to finish him, which [[Franchise/{{HALO}} the Master Chief]] calls him out on after his defeat. Then he teabags him.
* Machinima/RedVsBlue's "Son of a bitch!" running gag is usually done in threes, occasionally twisted with Spanish-speaking robot Lopez's "Madre de dios," subtitled as "Son of a bitch!"
** Also, when Simmons and Grif are facing down the tank in Season 1:
--->'''Simmons:''' Alright, let's run on three.
--->'''Grif:''' Wait, ON three, or one-two-three-THEN go?
--->'''Simmons:''' ON three, it's always faster to go on three! Okay ready, one. . .
--->* Grif starts running*
--->'''Simmons:''' two. . . three! * turns around, sees Grif already far away* Oh, you backstabbing cockbite.
* In the [[http://www.19nocturneboulevard.net/ 19 Nocturne Boulevard]] episode ''Sword Kvetch'', Cael must face the evil wizard's three challenges. Why? Tradition!
* [[LampshadeHanging Lampshaded]] in Episode 4 of [[Website/{{Cracked}} Cracked TV]] (5 Things You Shouln't Be Able to Buy on eBay):
---> Tic-Tacs! Bag of Dice! Some...third thing!
* Played straight in HarryPartridge's ''Stephen the Lesbian''.
--> "[[MakesJustAsMuchSenseInContext All hail Stephen, king of the Lesbians]]!"\\
"All hail Stephen, king of the Lesbians!"\\
"All hail Creator/StephenKing! *{{Beat}}* Of the Lesbians!"\\
"[[FlatWhat What-?]]"
* Hewy in ''WebVideo/HewysAnimatedMovieReviews'' reviews ''WesternAnimation/ToyStory3'' for the third episode of his third season.
* In ''WebAnimation/ZeroPunctuation'', Yahtzee subverts this in his review of ''JustCause''. He uses the title as a joke the first two times, where on the third he simply comments "how should I know?"
* From the YoutubePoop [[http://www.youtube.com/watch?v=CQn-z3eVgno Skellington's Revenge]]:
--> '''[[Film/TheNightmareBeforeChristmas Sally]]''': ''(after Jack says her vision of Christmas disaster is splendid and asks her to make him some crack)'' No! You're being an ass!
--> '''Mayor''': ''(after Jack kicks him out for saying conquering Christmas is a bad idea)'' Ugh...You're being an ass!
--> '''Jack''': [[spoiler: ''(after realizing Main/{{Satan}} is just using him to take over Halloween)'' [[HeelRealization How could I be such an ass?]] ]]

[[folder:Western Animation]]
* In ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', the Cutie Mark Crusaders consist of three different types of ponies. Scootaloo is a pegasus, Applebloom is an earth pony, and Sweetie Belle is a unicorn. Their names are three syllables each, as well.
** All the names of the mane cast except for Twilight Sparkle also obey the rule, thus: Rain-bow-Dash, App-le-jack, Pin-kie Pie, Ra-ri-ty, Flut-ter-shy.
* In one ''WesternAnimation/TinyToonAdventures'' short, a clown runs by in the background three times. After the third and final time near the end of the cartoon, Babs dryly explains he's "a RunningGag".
** The plot of the episode is about Buster's quest to revive a joke he's driven into the ground (represented by a clown in a grave...morbid). The joke has this trope too: "A duck, a rabbit, and a pig go to a restaurant..."[[note]]"...which hand do they use to eat their soup? Neither! They used a soup spoon!"[[/note]]
* In ''TransformersArmada'', there are three legendarily strong weapons formed by the combination of three Mini-Cons apiece... Caused partly by the MerchandiseDriven nature of the series, as Mini-Cons were sold in teams of three.
** Also, the Mini-Cons added a third unique group of transformers alongside the Autobots and Decepticons - as witness their unique emblem.
* ''Triple Threat - Rail Racer!'' And the original Triple-Changers came in sets of 3, and the Unicron Trilogy (and Headmasters) tended to have 3-kid sidekick teams. Transformers is _mostly_ based around the number 2, though.
* Lampshaded and Subverted in ''{{Duckman}}''. While looking for suspects at a nightclub, Duckman says "Something bugs me. He's the third suspicious character we've talked to, and the third one is always guilty". The lights go out, shots are heard and when it's over the suspect is dead on the floor. Cornfed observes "So much for the RuleOfThree."
* In an ''WesternAnimation/{{Animaniacs}}'' short: "Tea? Coffee? Monster?"
** Another example: Slappy is eulogizing her archfoe Walter Wolf, who was faking the funeral to 'get' her. According to Slappy, Walter was a firm believer in this rule, including three bombs that were found lying around to blow her up. 'I'm sure he'd want to be buried with it.'
* Averted on ''WesternAnimation/ExtremeGhostbusters''. "On the count of three." "Three!"
* In one episode of ''WesternAnimation/{{Freakazoid}}'', the titular character is picked up by a holographic pterodactyl and dropped from an extreme height, and he screams for help every time he falls. Lampshaded the third time when he and the Lobe fall together:
-->'''The Lobe:''' Freakazoid, why is it taking us so long to fall?
-->'''Freakazoid:''' [[RuleOfFunny Cuz it's funny!]]
-->'''The Lobe:''' No it's not, it's just stupid! It's as dumb as that Handman episode!
* ''WesternAnimation/SouthPark'': "Biggie Smalls. Biggie Smalls. Biggie Smalls."
** South Park also did it in the Imaginationland episode:
--->"Sir, we have a security breach!"\\
"There's an Unauthorized Entry Alert! It's coming from Sector Two!"\\
"Sector Two??"
** Cartman then jumps in through a window. The second time the above dialogue occurs, Cartman again jumps in through the shoddily repaired window. The third time it happens, Kyle jumps in through the remnants of the window, causing the general to exclaim, "Why is it so easy for children to break into the Pentagon?!"
** Also in the episode "Two Days Before the Day After Tomorrow" after Stan, Kyle, and Cartman leave, Randy volunteers to go after them, whereupon he is told "You can't go, you'll freeze to death!" whereupon Gerald volunteers to go, and is told "You can't go, you'll freeze to death!". Cue a third random person volunteering and a third random person reluctantly saying "You can't go, you'll freeze to death."
* SchoolhouseRock did a song about the 3's times tables. Hilariously, it was called ''Three Is a Magic Number''. It was full of all kinds of examples.
* This is all over the place in the [[DisneyAnimatedCanon Disney cartoons]]:
** ''OliverAndCompany'': "Three sunrises. Three sunsets. Three days, Fagan."
** ''Disney/TheLittleMermaid'': "Before the sun sets on the third day..."
** ''Disney/{{Aladdin}}'': Whoever frees the Genie can ask for ThreeWishes. But there are also three things the genie can't do: kill, force love, or raise the dead (though that's excluding his earlier statement that wishing for more wishes is not allowed). Also, it's three days (according to the Sultan) 'till Jasmine's birthday.
* In ''WesternAnimation/{{Futurama}}'': One spoonful calms you down, two spoonfuls help you sleep, but three spoonfuls, you'll [[NeverSayDie go into a sleep and never wake up! Never!]]
** "Oh Fry... I love you more than the moon and the stars and the [[RoboSpeak POETIC IMAGE NUMBER 37 NOT FOUND]]"
* On ''TheFairlyOddparents'', an episodes RunningGag is used three times. Also, in the "Wishology" trilogy, three wands were eventually needed to defeat [[BigBad The Darkness]].
* In the fourth season of ''WesternAnimation/WinxClub'' there are three eternal fairies that give the girls the three gifts of destiny.
* In ''WesternAnimation/TheFlightOfDragons'', when Carolinus first decides to inspire TheQuest to bring about his idealized magic realm, Lo Tae Shao reminds him that there must be three warriors at the start of a quest, because "the laws so command it."
* Lampshaded in an episode of ''WesternAnimation/DrawnTogether'', when Wooldor describes what his television show will do. In his words, it will "Entertain kids, annoy adults, and funny third thing!"
* Also [[LampshadeHanging lampshaded]] in the ''WesternAnimation/SpongebobSquarepants'' [[TheMovie Movie]], during SpongeBob's speech at the end of the film:
--->'''SpongeBob''': And no amount of mermaid magic...or managerial promotion...or some other third thing...
* ''WesternAnimation/TheCritic'' uses the same joke in this case: To prove to Jay that he's being repetitive, his boss Duke shows him a video of him hosting his show ''Coming Attractions'', [[http://www.youtube.com/watch?v=yPBTE0wlZF4 but with the screen split into thirds.]]
-->'''Jay:''' ''(section 1, from 1988)'' ''Film/RainMan'' ''(section 2, from 1992)'' ''AFewGoodMen'' ''(section 3, from 1993)'' ''The Firm'' ''(all together)'' is the latest stinker from TomCruise. He doesn't act anymore, he's on ... Cruise Control! AAAAAAHAHAHA! AAAAAAHA! I JUST ... I JUST! MADE THAT! UP!
* Examples from SpeakOfTheDevil include the ''{{Freakazoid}}'' "Huggbees", ''WesternAnimation/{{Beetlejuice}}''.
* Combined with InherentlyFunnyWords in ''ThePJs''. Thurgood is [[ItMakesSenseInContext working on a stand-up act]] and the book he got on how to be funny says things in three are funny as well as words with a hard k in them (like knish, tukas, fakakta). He logically assumes then that the funniest thing ever [[RefugeInAudacity is KKK]].
* ''WesternAnimation/FamilyGuy'' uses this trope liberally for their gags. DVDCommentary also states the trope name for when a comedy uses a gag that involves three things.
* In ''WesternAnimation/DoraTheExplorer'', there are usually three places that the characters have to go in each episode, with the exception of certain double-length installments. Also, saying SwiperNoSwiping three times stops Swiper, though if the characters aren't able to manage it in time, then he declares that they're [[YouAreTooLate too late]] and swipes.
* Lampshaded AND subverted in ''RobotChicken'', the comics special, Bane repeatedly turns up suddenly and breaks Batman's back, followed by a hilarious music sting (dumdedum dum dee THAT'S BANE!). He does this the expected three times... then a fourth, to which Batman scream "RULE OF THREE, ASSHOLE, NOT RULE OF FOUR!"

[[folder:Real Life]]
* Body, Mind, Soul. Are the last two one and the same? Depends on whom you ask.
* Birth, Life, Death.
* Past, Present, Future.
* [[LandSeaSky Land, Sea, Sky.]]
* Lithosphere, Hydrosphere, Atmosphere.
* Breakfast, Lunch, Dinner. Averted in some countries, like in France, where you get "le goűter", or "the afternoon snack" (around 4:00 PM), which counts like mealtime.
* Three primary colors.
* Three point one four.
* Who hasn't heard this? "Okay ready? OnThree..."
* Survival's Rule of Threes for us untrained folk: Three seconds without blood(flow), three minutes without air, three hours without warmth, three days without water, three weeks without food, three months without love. You may think the latter one is a joke, but it's not. People who become isolated, say from being shipwrecked, will go through a crisis about three months in. They may have all they need in terms of shelter, food and safety, but without fellow human beings, they're likely to stop caring for themselves, lay down and die. (A small proportion of people can live as hermits; they're the exception.) There's a reason [[CastAway Wilson]] was so important.
* There is a saying "One time is chance, Two Times is a coincidence, Three times is suspicious/a conspiracy" which suggests that 3 times is the least amount of times something has to happen before it is established as something more than coincidence.
** In the UK, it's "once is happenstance, twice is coincidence, three times is enemy action". At least one James Bond story was built on this: Goldfinger, where Auric refers to this (the UK variant stated above) as being a phrase from Chicago.
** The US military teaches a similar pattern regarding predictable behaviors like patrol schedules and routes; First time, you're seen. Twice is a pattern. Third time, you're dead.
* In the UK, the school year is traditionally divided into three terms: Winter, Spring and Summer (or Michaelmas, Hilary, and Trinity (or even Michaelmas, Lent, and Easter) if you go to an old established school or university).
* Same thing in India, except we just call it [[ExactlyWhatItSaysOnTheTin 1st Term, 2nd Term, and 3rd Term.]] There are also three big exams each year, known as end-of-term exams or simply term exams, and three sets of holidays following the end of each term. The third one is the big summer vacation, which marks the end of the school year.
* Apparently the United States Marine Corps [[http://www.washingtonpost.com/wp-dyn/content/article/2005/10/25/AR2005102501550.html uses it too]] (albeit with the fire team level as an exception). This is referred to as "triangularization" and was adopted by everyone from the German Wehrmacht in the 1930s. Previously, it was the rule of fours.
* In {{NASCAR}}, there has been a coincidence that every three years from Dale Earnhardt's 1998 Daytona 500 victory, someone close to him won the Great American Race: Michael Waltrip (DEI driver) at the race where Earnhardt died in 2001, Dale Earnhardt, Jr. (his son) in 2004, Kevin Harvick (his replacement at Richard Childress Racing) in 2007, and Jamie [=McMurray=] (Earnhardt Ganassi driver) in 2010.
** A number of teams operate in the Sprint Cup Series with three teams: for instance, Roush Fenway has three teams (Matt Kenseth, Greg Biffle and Carl Edwards), as does Richard Childress (Paul Menard, Kevin Harvick and Jeff Burton).
* The Rock, Paper, Scissors game (or Stone, Scissors, Paper, depending on where you are).
** Or the Malay version, which uses bird, water, rock.
* Look up any Weight Training routine, a vast majority of them will consist of each exercise being 3 sets of x reps, with 3 sets of 10 being the most popular.
* Listing things in groups of three for emphasis is generally considered a useful technnique for giving a speech. One of the better examples was Tony Blair's declaration that his three priorities for government were, "Education! Education! Education!"
** In the same vein, there's Stephen King's famous advice to wannabe writers: "Read, read, read! Write, write, write!"
*** Before that there was Danton's speech before the legislative assembly on September 2, 1792: "Gentlemen, what is needed is audacity, audacity again and audacity always, and France is saved." (''Messieurs, il faut de l'audace, encore de l'audace et toujours de l'audace et la France est sauvée.'')
*** And Count Raimondo Montecuccoli (1609-1681), who wrote that to wage war you need three things: Money, money and money.
** The three most important things to remember about real estate purchases: "Location. Location. Location."
* Ancient Jewish and Arabic custom allowed a man to divorce his wife by simply declaring 'I divorce you' three times. It has resulted in at least one incident where a man [[http://www.boston.com/news/odd/articles/2006/03/28/man_accidentally_divorces_wife_in_sleep/ accidentally divorced his wife.]] (Or well, almost divorced her; turns out Islamic law, like any other half-decent legal system, does not allow you to make decisions like that while you're asleep.)
** While not current in divorce, three is still important in Jewish court matters. The smallest size of a court is three (since it's the smallest plural odd number, meaning no ties). Also, ''Hataras Nedarim'', a process done on Rosh Hashana Eve, involves collaring three friends who sit as a court and asking them that one's unfulfilled promises be annulled. The "court" repeats a small passage three times which effects the annulment. Similarly, a shorter version involves just saying the words "''mutar lach''" (you are released) three times. And there are three basic duties of a Jewish husband toward his wife - feeding her, providing her with cover, and satisfying her sexually.
*** It's common for courts other legal systems to use three judges, such as the Magistrates' Courts in the United Kingdom.
* In sports, there's the Triple Crown (horse racing), and the "hat trick" (various sports, all involving 3 of an action, usually but not exclusively scoring).
** Also (in Baseball) the Hitting Triple Crown--highest batting average, most home runs, most runs batted in--and the Pitching triple crown: most wins, most strikeouts, lowest earned run average.
** There is also the Rugby Union Triple Crown, fought out (as part of the annual six nations games) between England, Scotland, Wales and Ireland. The result is settled after each of the four teams has played three matches (one against each of the other three), hence the name.
* Baseball seems to run on this trope. Here are some examples:
** 3 strikes and you're out.
** 3 outs per inning.
** 3 bases plus home.
** More than 3 balls is a walk.
** Thrice 3 innings in a game (without extra innings due to a tie).
* In Cricket there's the hatrick - 3 wickets, 3 consecutive balls.
* In American football, any score on the free play after a touchdown is worth one third of the normal value.
** Kinda sorta. A kick/PAT is considered something different from a normal Field Goal, and a 2-point conversion is considered distinct from an actual Touchdown. Partially, in that the players on both sides in the post-TD plays will usually be Special Teams/specialists, rather than the normal lineup, and they will normally not use the exact same plays used in other situations. Yardage is also irrelevant in these plays; it's either a score or nothing.
* In basketball, the most points you can score with one basket is 3 points.
** There's the triple-double, for getting 10 or more in any three stats: usually points, assists and rebounds. (Technically, more than triple is possible, but triple is the most commonly talked about "limit", since steals and blocks are difficult to get 10 or more of.)
* In bowling, three consecutive strikes is called a "turkey", and it's possible to bowl three times in the tenth frame, if you score a strike or a spare.
* The Roman orator Cicero often used trios of phrases when wanting emphasis in speeches. While he may not have initiated the habit, many, many admirers picked it up.
* "Government '''of the People, by the people and for the people''' shall not perish from this earth". This trope is probably why it's usually quoted as "blood, sweat and tears."
* As mentioned on TheOtherWiki, AbrahamLincoln used the tricolon in more than one of his speeches, including the Gettysburg Address. "But, in a larger sense, '''we can not dedicate...we can not consecrate...we can not hallow''' this ground."
* A number of nations or states use the rule of three for their mottoes, such as the French ''Liberté, Egalité, Fraternité'' (Freedom, Equality, Fraternity) or the Congolese "Justice, Paix, Travail." (Justice, Peace, Work).
** During WorldWarII, the [[LesCollaborateurs Vichy regime]] adopted a new motto: ''Travail, Famille, Patrie'' (Work, Family, Country). Of course, things were pretty bad in France, so LaResistance and various wags turned it into ''Trouvailles, famine, patrouilles'' (Lucky finds, famine, patrols).
* From the Declaration of Independence, "Life, Liberty and the Pursuit of Happiness" (borrowed from John Locke, who used "Life, Liberty and Property")
* And the German ''Einigkeit und Recht und Freiheit'' (Unity and Justice and Freedom).
** The Nazi Regime was called the Third Reich.
** ''"Ein Volk, ein Reich, ein Führer''". ([[DichterAndDenker One people]], [[NaziGermany one empire]], [[AdolfHitler one leader]].)
*** Which may owe something to a slogan from the French ancien régime: "Un roi, une loi, une foi." (One king, one law, one faith.)
** From an earlier time in German history: ''Kinder, Küche, Kirche'' (the proper concerns of women: children, kitchen, and the church)
* Lotsa "Three Strike" systems when it comes to rules in general. Two warnings, and the third time is when the proverbial poop hits the fan.
* Hockey goaltenders may be pulled from a game after allowing three goals.
* There are lots of threes in the human body: Three bones in the ear (hammer, anvil, and stirrup), three types of muscle (smooth, skeletal, and cardiac), three layers in the skin (epidermis, dermis, and subcutis), three types of blood cells (white, red, and platelets), hair can be divided into three parts (bulb, root, shaft)... Also, all organ systems arise from one of three primary germ layers in embryonic development -- the ectoderm, the mesoderm, and the endoderm.
** Related: insect anatomy - head, thorax, abdomen.
* In mathematics, there are three basic ways to approach a problem: graphically, numerically and algebraically. (This is sometimes even called the Rule of Three.)
** In the same vein, most countries teach the topic of Speed, Distance and Time all at once, often arranged into a triangle of three.
* The saying 'Third time lucky!' -Which is the idea that if you fail twice, you will succeed the third time, not that it's actually true. It's also heard as "Third time's the charm!" in America.
* SexDrugsandRockandRoll.
* Black, blanc, beur (africans, europeans, arabs): motto parodying the colors of the French flag in order to celebrate the cultural diversity of France.
* The powers of a State, are comonly divided in: Judicial, Executive and Legislative
** The legislative process in the US has to be approved in three stages: the House of Representatives, the Senate and the President. In the UK it's the House of Commons, the House of Lords and the Queen (or in old terminology: "Crown, Lords, and Commons"). In both cases, the former two can be swapped around.
* Several of the US space shuttle orbiter's systems are triply redundant, notably the Space Shuttle Main Engines, the fuel cells which generate electricity, and the auxiliary power units which provide hydraulic pressure to manipulate the orbiter's aerosurfaces and gimbal the three main engines.
* The signal for Help in Morse code consists of three letters (SOS) and each letter is composed of three dots or dashes.
** Three somethings is a convention for a disaster signal: three fires, three gunshots, [[GameOfThrones three blasts]]...
* Next time someone comes to your door, see if they knock in groups of three.
* Medical schools operate on the principle of "first you watch a procedure, then you perform it, then you teach someone to do it".
* The three kinds of science: Life, Physical, and Earth. And then [[SixthRanger social]]...
** Alternatively: the three sciences, Physics, Chemistry and Biology.
* There are three kinds of tectonic plate boundaries: convergent, divergent and transform. Within that, there are three kinds of convergent boundaries as well.
* The Mozambique Drill follows this for close quarters combat. Two quick shots to the torso, followed by a slower and more well-aimed headshot to stop the target.
* In Athenian democracy, Kleisthenes created a new kind of subdivision of the city's territory and free population called the ''phylai'' in order to create a stronger sense of belonging together. Each ''phyla'' consisted of a district of the city of Athens, one of the coastal and harbour region, and one of the inland agricultural region, Attica.
* In many pre-modern Europe that part of society that had the right to participate in government (legislature) in some form was usually divided into three estates - clergy, nobility, and the rest.
* Appears quite a bit in the United States Constitution. First, there are classes of senators. Three of them. Senators of each class are elected on different election years (but always even years, unless a senator dies in office). (For the record, should a [[SixthRanger fifty-first state]] be added, its senators would be in the first and second classes.) There are also nine Supreme Court Justices.
* It's taught as a rule of drafting in some law schools on the basis that it emphasis that you are covering everything relating to a particular topic. For example a costs indemnity will often read "[Party A] will indemnify, reimburse and hold harmless [Party B] against any losses, costs or expenses [Party B] may incur, suffer or bear..."
* In C++ programming, it is considered poor practice to define a destructor, copy constructor, or copy assignment operator without assigning the other two; this is actually called the "rule of three" in the [[ExpoSpeak thrilling world of C++ jargon]]. [[{{Infodump}} The reason for this]] is that the compiler usually creates these functions automatically, and the only reason that the programmer should define one is also the reason to define the others.
* Research into short term memory has in fact determined that memorizing in groups of three is the easiest among all combinations.
* Generally, the slot machines of most pubs and clubs incorporate this with the RuleOfSeven, whereas scoring triple sevens nets the biggest jackpot.
* Groups of three supposedly have some kind of special significance in Russian culture...allegedly because during Soviet times when things were cheaper if three men each contribute a rouble they could buy a handle of vodka to share and then have exactly enough kopeks left over for zakuski (snacks). (Ok, not quite as noble as the French or German examples, but practical..)
** Even earlier were the [[KangarooCourt Troika tribunals]].
* "Leaves of three, let it be." for avoiding poison ivy.
** And poison oak. Also, poison sumac.
* Franz Boas defined three types of anthropology: Ethnology (later split into social and cultural anthropology), physical anthropology, and linguistic anthropology. [[SixthRanger Archaeology was folded into anthropology later.]]
* In computer engineering, there's this: if a CPU encounters an exception, it calls an exception handler routine. If the handler encounters an exception itself, the CPU calls a special handler. But if the special handler too encounters an exception (such as the interrupt descriptor table being corrupt, making it impossible to call any handlers), that's called a triple fault and the CPU shuts itself down. Some kernels like Linux use it as a last resort in case the PC goes completely bonkers: if an ACPI reboot fails, the kernel sets the IDT length to zero, making the table impossible to access and ''[[LogicBomb intentionally triple-faulting the CPU]]''. Not exactly to spec but it works.
* [[InvokedTrope Attempted]] and [[SubvertedTrope failed]] by Rick Perry during the Republican Presidential Debate of November 9th, 2011. Governor Perry said that as president, he would eliminate three government agencies: [[http://www.youtube.com/watch?v=zUA2rDVrmNg "Commerce, Education, and the-um, uh what's the third one there? Let's see..."]]
* Quantum Chromodynamics states that each quark, the elementary particles of which hadrons are made, carries an electric charge which is a multiple of a third of the elementary charge; that each quark is one of three 'colours'; that quarks, like all elementary particles, come in three families; and much of a quark's characteristics is based on a unitary group, a mathematical construct, called SU(3).
* OlderThanFeudalism: In AncientRome, many legal matters were performed by simply stating what you were doing three times in front of witnesses, i.e. if you were marrying someone, you would say "I marry you" three times.
* At the beginning of World War 2, RAF fighters generally operated in groups of three. However it was discovered that in combat one pilot would become separated from the other two and fall easy prey to enemy fighters. They then adopted the Luftwaffe's system of groups of four which in combat could easily sub-divide into two groups of two.
* Internet Explorer, Chrome, Firefox ([[MyFriendsAndZoidberg Opera, Safari, Maxthon, SeaMonkey, xxxterm...]]).
* When challenging someone to recite a TongueTwister, it's common to dare them to say it three times fast.
* One that's pretty famous; Veni, Vidi, Vici. I came, I saw, I conquered.
* A killer isn't considered a Serial Killer until after they have killed 3 people.
* On TheOtherWiki it says that the UN considers a mass grave one that holds at least three execution victims.
* On a PBS documentary on JDSalinger one speaker said that one assassin using [[TheCatcherInTheRye a book]] to justify themselves is just "crazy" while ''three'' makes one wonder [[MyGodWhatHaveIDone what on earth they had done]] (the guy described it like "voodoo" -- Salinger "put his depression into Holden", unstable readers internalized it then concluded that "all phonies must die").
* Neutrons, protons and electrons.
* Nikola Tesla was obsessed with the number three. He did everything in numbers divisible by it.
* The common cold: Three days coming, three days staying, three days going. It's a pretty handy mnemonic and not inaccurate.
* The 3 main TV networks of the US: NBC,CBS and ABC (Fox and UPN/WB/CW came later and are still kinda second to the 3 big ones.)
** In Britain for about 30 (3x10) years from the mid-[[TheFifties 1950s]] to the mid-[[TheEighties 1980s]], there were three TV channels; BBC One, BBC Two and ITV.
* The two trinities of forensics/criminalistics: means,motive and opportunity, and victim,suspect,crime scene.
%% I think "declension" is the right term for the example below; if not, feel free to correct it.
* The classic (half-joking) declension; "I am ''firm'', thou art ''obstinate'', he is ''pig-headed''." Related to the ''Series/YesMinister'' joke under Live-Action TV above.
* Three dimensions of space (that we know about, anyway).
* Tricolour national flags are very common: Russia, Germany, France, Italy, Colombia. Even when the design is different, many national flags don't have more than 3 main colors.
* There's a [[http://en.wikipedia.org/wiki/Project_management_triangle sort of triangle in projects]]: Time, Quality, and Money, also known as 'Fast, Good, Cheap'. Pick two. You can get something good done cheap if you're willing to wait; you can get something good done ''fast'' if you're willing to ''pay'', and if you're not willing to put in the time or money, don't expect it to be any ''good''.