Alexandru III cel Rău (Alexander III the Bad, died 20 March 1597) was the Prince of Wallachia between November 1592 and 1593. He was the son of Bogdan Lăpușneanu, former Prince of Moldavia. Although Alexandru had in his government both local Boyars and Greeks, complaints arose to the Ottoman Empire in June 1593 accusing the Prince of behaving like a tyrant just like his uncle, Prince of Moldavia, Aaron the Tyrant.
