Emma Thomas, who is also the director's producing partner, has said there is no possibility of him returning to the franchise after The Dark Knight Rises.
When asked by SFX whether Nolan might direct a fourth Batman instalment, she reportedly replied: "No. Never."
She went on: "No, that's truly a never. I can't imagine a world in which he would ever want to come back.
"At a certain point it's fun to go off and do something different, you know. We've spent almost ten years of our lives making Batman films. He was very excited about this film, and the story that he'd come up with, but I just cannot imagine that he would get that excited about another version of the same thing.
"The great thing about a trilogy is that it feels like you've got a beginning, a middle and an end. It's like an extended version of a regular film. Once you get into a fourth film then it's just episodic, and I just can't see him getting excited about making another film where basically you're just wheeling in different villains."
The Dark Knight Rises opens in cinemas July 20.
Watch Cillian Murphy tease whether he will appear in the film below:
Photo gallery - The Dark Knight Rises: