SAW III screenwriter Leigh Whannell and Director Darren Bousman have confirmed that they will not be returning to do a fourth film. Although Jigsaw actor Tobin Bell has said to have signed on for an undisclosed amount of sequels.
"The one thing great about the Saw films are they're non-linear. They don't just go from present into future, they jump all over the place. Characters that died in previous films come back in this one for scenes," said Bousman. "I don't think just because you've died in a "Saw" film means you're out of the Saw family. There's many stories left in the "Saw" thing. We set up stories in "Saw II" that played over to "Saw III." We set up stories in "Saw III" that will play over into the next one."