One reviewer from Reel Reviews describes the film as a "total mind-fuck" that proves unsettling and highly imaginative despite its limited resources.
A review on PopHorror highlights that while the film often keeps its horror in the shadows, it features a particularly "nasty but effective" moment involving "demonic cunnilingus" that catches viewers completely off guard. 3 DemonsHD
Director Matt Cunningham has referred to it as a "Lynchian possession movie," blending surreal dream sequences and mental breaks that leave the audience questioning what is real. One reviewer from Reel Reviews describes the film
Despite the mixed reviews on the story, Peter Tell’s performance as Deputy Fisher is frequently cited as a standout, successfully conveying a "gradual descent into madness". 3 Demons - Review — Despite the mixed reviews on the story, Peter
While some appreciate the "cool horror imagery," others feel the film simply "cannot outrun its budget," noting that the script might have been more interesting on paper than it is on screen.
On Letterboxd , common complaints focus on the story being "hard to follow" and "all over the place," leading some to warn others not to waste their time on the "confusing mess".
Several critics from Movies & Mania and VS Movie Podcast suggest that viewers should treat it as a "mood piece" rather than a straightforward story. They argue that the ambiguous ending actually makes the film more compelling in hindsight. Common Audience Feedback