If scary movies aren't your thing, chances are that you are likely going to hate this thin, blood-soaked piece of independed cinema. But if you are a fan of traditional slasher flicks with creative kills and satisfying performances, this might just become your favourite one so far.
There isn't too much going on in the film plot-wise. In fact, a description of Terrifier 3's plot wouldn't be much longer than a summary of one Friends episode. Instead of answering the questions from the previous installment, the movie just brings up even more questions for the now-confirmed sequel, which may unsatisfy some fans, but at the same time already creates hype for Terrifier 4.
Production values are miles ahead of the previous films and it is pleasing to se Damien Leone improve so much in his craft.
As for the period before the release of the film, I personally think some of the marketing choices were a bit over-the-top, such as the release of an official hot-line, but that doesn't diminish the quality of the movie itself.
Overall, the movie is an improvement over the previous installments and it will definetely satisfy you if you are a Terrifier/slasher fan.