The teenage Brazilian has attracted enquiries from Barca and Manchester City this month.
And Corriere dello Sport says Roma rejected a bid of €25 million from Barca this week.
Marquinhos is aware of the interest, but insists he's happy at Roma, which are now eager to upgrade his contract before the summer market opens.
€25m for a teenage defender? Is that clever spending by Barca? Give us your shout below...