Schweinsteiger saw red for a second bookable offence during Bayern's 1-1 draw against United in their UEFA Champions League quarter-final first leg at Old Trafford on Tuesday.
The German international, who scored the all-important away goal for the defending champions, received his marching orders from referee Carlos Velasco Carballo after a lunging tackle on Rooney late in the game.
"I don't really want to say what he said but I think it's a foul," he said.
"It could have gone either way.
"He could have hurt me, he's gone in with his studs and the referee has booked him, so it's not my decision.
"It's not nice to see anyone sent off and I didn't try to get him sent off. The referee has made a decision. I've tried to stop myself getting hurt and the referee has had a decision to make."
