He was worn out and wanted to spend more time with his family.
It's very demanding doing three big films in a row, which is why he thinks Dan and his pals will have a rest.
Azkaban starts filming in March and could be released in June 2004.
What you've been saying on the message boards:
"The film would be so different without those faces - and what about everyone who saw the film before reading the book? Their images will be ruined... meh. Just wanted to post my upset. Noooo. Nooooo. I'm done. ((sob))
"OMG: I can't believe Dan Emma and Rupert might be stopping' from da movie! - If they go, it'll never be the same!"
"OMG I hope he doesn't! It wouldn't be the same without them! No one could ever act like Emma or Rupert or even Dan himself! OMG...
Fiona aka Hermione
"If they decide to quit after Harry 3 then I think I will get well annoyed, but I wouldn't mind because I would just take over the role of Harry and get an Oscar for it!"