Chris Brown publicist dumped him!

Chris Brown’s career has taken another hit after his publicist quit.

The singer’s spokeswoman, Tammy Brook, will no longer be representing him after the star trashed his GMA dressing room, smashed a window and left without his shirt from the morning talk show earlier this week.

Sources close to Brown told New York Post gossip column Page Six that she and the Run It hitmaker have decided to end their relationship following his meltdown on GMA.