"There is a scene that is not R-rated," Vaničekin said in the latest issue of SFX magazine (which has House of the Dragon season 3 on the cover). "It’s a really, really hard scene. And I have to cut it, unfortunately, so you just won’t experience it as brutally as it is right now because I need to have the R-rated movie. So we are trying to find a good balance."
At the time of the interview, Vaniček was in the middle of getting the movie rated by the Motion Picture Association. The goal was to achieve an R rating in the US (which equates to a 15 or 18 age rating in the UK), in line with the rest of the franchise.
Vaniček didn't give any clues on what the scene entailed, but if it was too much for an R-rating, we can only imagine the level of gore. Evil Dead Rise contained a scene where a possessed victim grated their face with a cheese grater, and the 2013 Evil Dead remake showed a girl cutting her own arm off with an electric carving knife. Still, both movies managed to earn an R-rating in the US and an 18 rating in the UK. So, the cut Evil Dead Burn scene must have been extremely graphic.