Marcantonio Mario Dimitri dei Principi Ruspoli (Etterbeek, Brussels, November 28, 1926 – Recife, Pernambuco, August 1, 2003) was the 3rd Principe di Poggio Suasa, son of Costantino Ruspoli (Costantino is an eldest son of Mario Ruspoli, 2nd Prince of Poggio Suasa), and wife Elisabeth Catherine Adrienne Marie Anne Comtesse van der Noot d'Assche.