Despite many facts that would have proven differently, there will indeed be Quidditch in the third movie, Harry Potter and the Prisoner of Azkaban. This was confirmed in an interview with Daniel Radcliffe, which can be read over at Mugglenet..here. This fact though does make it unclear as to how quidditch scenes will be done without Oliver Wood, Marcus Flint, and possibly Cho Chang who may or may not be cast for this particular film.

Hm...

(Much thanks to Mugglenet for this heads up)