Bobby Brown has turned the page on his return to New Edition -- by dropping off their reunion tour for "medical reasons."

TMZ reports that the rest of the group will go on without Bobby, who'd been having trouble keeping up the pace in recent shows -- missing dance moves and leaving the stage altogether for some songs. His publicist blamed the trouble on an "intrusive medical procedure" that he thought he could work through.

Brown has issued a statement saying, "I apologize to the fans of New Edition. I really wanted to be with my brothers, but presently I am unable to give the fans what they typically expect from New Edition."