Not canceled....so far. Quote from Seattle Times this week.
"We're very hopeful about a Season 4. Obviously, the network has a lot of stuff that they're dealing with and clearly they're going to want to see what their development is, but they've been very supportive of Parenthood," showrunner Jason Katims says.
Read more:
http://www.seattlepi.com/ae/tv/tvguide/article/Parenthood-Crosby-s-Dilemma-the-Next-Twist-in-3365608.php#ixzz1nnjNlzVN