'''''Sleepaway Camp III: Teenage Wasteland''''' is a SlasherMovie released in 1989. Shot back-to-back with [[Film/SleepawayCampIIUnhappyCampers its predecessor]], it follows Angela infiltrating a group of campers to continue to exact her brand of "niceness".
[[Film/SleepawayCampIVTheSurvivor Another sequel]] was made... but not without problems.
!!This film has the examples of:
* AdultsAreUseless: The adults don't even notice their campers are rapidly disappearing.
** Although part of this is not because ''all'' the adults are useless, but because they'd been split into three teams and separated from one another. Still, the uselessness of two of them is a big reason why they die.
* AlphaBitch: Cindy
* CarryABigStick: Angela kills Jan and Herman by beating them with a stick.
* CruelAndUnusualDeath: Angela kills one of the female counselors by burying her up the neck and running over her head with a lawnmower.
** Actually, she lifted the mower up and then slammed it down on the counselor's head.
* DeadPersonImpersonation: Angela steals Maria's identity to infiltrate the New Horizons Camp.
* DeathByRacism: Cindy.
* DecoyProtagonist: The opening makes it seem that we'll be following Maria, but then Angela kills her.
* DirtyOldMan: Herman.
* EyeScream: A cop gets a syringe in the eye.
* FinalGirl: Marcia.
* FishingForSole: Angela manages to fish out a hockey mask from the water. Right afterward it's remarked that the date is [[Franchise/FridayThe13th Saturday the 14th]].
** Riff, Snowboy, and pretty much all of the campers.
** Averted by Greg and Anita, who even Angela says they're nice kids. She still kills them anyway, only because she considers them boring.
* KarmicDeath: Peter is killed by his own fireworks.
* NiceGuy: Tony.
* OnlyKnownByTheirNickname: Snowboy.
* PetTheDog: Angela decides to let Marcia and Tony live at the end of the film. This comes back to bite her in the ass when Marcia attacks and (possibly) kills her.
* RichBitch: Cindy
* ShoutOut: Six of the characters are named after ''Series/TheBradyBunch'' kids and we also get a few kids named after characters from ''Theatre/WestSideStory'' including the disguised Angela going incognito "as Maria"
* StraightEdgeEvil: Angela does not smoke, drink, or use illegal drugs and if she catches doing any of those things, look out!
* SummerCampy: Camp New Horizons
** Although technically this film is set in autumn at what USED to be a summer camp.
* TokenMinority: Each group of campers has at least one African-American and one Asian-American.
* UnwillingSuspension: Angela does this to Cindy.
* YouKilledMyFather: Turns out Sean from the second movie had a vengeful father(He is not TheHero so he is killed anticlimacticly after confronting Angela)
* WhatHappenedToTheMouse?: Tawny the reporter confirms the Camp Rolling Hills massacre death count at [[spoiler: 19, meaning Molly didn't survive the previous movie.]]