Molinaro has impressed since his January move to the German giants.
"Perhaps my words have been misinterpreted. Molinaro is at Stuttgart on loan with the right of redemption, which expires on May 31," agent Pasquale Gallo told Tuttomercatoweb.
"He is feeling very good in Germany and doing very well in the league. There is already a fixed price and I think the Germans will purchase him outright.
"I am excluding other solutions, both Roma and other possibilities [mentioned in the press]."