One Night at Flumpty's 3 is an upcoming game releasing at some point in 2021.
It will be the third and final installment of the series. The game was announced as part of the Fazbear Fanverse Initiative
Some gameplay elements from the cancelled One Week at Flumpty's will be borrowed, but otherwise the gameplay will be new. Hard Boiled mode will also be returning in ONaF 3.
It won't be a parallel to FNaF 3 but it will have cameras.
August 23rd: Jonochrome announces One Night at Flumpty's 3 and publishes a teaser of a "bloody" Flumpty Bumpty with the words "Did you miss me?"
August 28th: Jonochrome makes a "What I can say about ONaF3" video explaining that One Night at Flumpty's 3 will be his final game and why, talks about, what will be expected to be in ONaF 3 and also announces that the OWaF animations are Most Likely over.
November 7th: Jonochrome states that ONaF 3 is "more or less finished" and that he's waiting for the ports to release while in the meantime he's playing the current version of the game.
November 10th: Jonochrome confirms on Twitter that all previous characters will be returning and no new characters will debut in One Night at Flumpty's 3.
March 20th: The Game Jolt page for ONaF 3 was leaked although Jonochrome has stated he is not worried because the page was practically empty. The leak did however reveal that the game will be rated as Mature compared to the other installmets Teen rating.