Leo III of Armenia

Leo III (1289–1307) was king of Armenian Cilicia, the son of Thoros III and Margaret of Lusignan. Crowned in 1303 while still a minor, he ruled with his uncle Hethum II, who acted as regent.

In 1305 the two led the Armenian army to defeat a Mamluk force near Bagras. On 17 November 1307, the Mongol general Bilarghu had Leo and Hethum massacred at a banquet in Anazarbus. He left no children, and his uncle Oshin succeeded him.