Leo III (or Leon III; ; occasionally numbered Leo IV; 1289–1307) was a young king of the Armenian Kingdom of Cilicia, ruling from 1303 or 1305 to 1307, along with his uncle Hethum II. A member of the House of Lampron, he was the son of Thoros III of Armenia and Margaret of Lusignan, who was the daughter of King Hugh III of Cyprus.
- Occupation
- sovereign
- Position held
- king of Armenia
- Born
- 1289
- Died
- 1307
