"I didn't really think there'd be this many upsides to having a show officially cancelled by a network, but I'm feeling happier than I've been in a long time." - Quoted C.H. Greenblatt.

So, while still finishing the third season, After the last clutter of episodes are aired, It seems that Chowder, is cancelled. At one point there was actually a hour long special in progress, but never got the chance to air. This information is all found at C.H. Greenblatt's blog, here - http://www.nerdarmada.blogspot.com/

This is good, however, because C.H. Greenblatt says he may have other things in progress, and we all know how amazing his work was with "The Grim Adventures of Billy and Mandy" and eralier on in the show "SpongeBob SquarePants" But im sure we wont forget "Chowder".