The Spanish champions announced the agreement with Marquez, whose contract had been scheduled to run through June 2012. Hours later, the Red Bulls scheduled a Tuesday news conference to announce the signing of a star player, without saying who it was.
Marquez didn't say where he would sign, although his talks with the Red Bulls have been common knowledge in soccer circles. His release allows him to sign with New York without a transfer fee.
"We're analyzing the options that we have and we'll see what works best," Marquez said.
A farewell ceremony was held Saturday at Camp Nou.
"One of the our team's reference points leaves Barcelona to start a new stage," team president Sandro Rosell said. "Rafa Marquez has been a key player for our last two coaches."
