Ruben III (), also Roupen III, Rupen III, or Reuben III, (1145 â Monastery of Drazark, May 6, 1187) was the ninth lord of Armenian Cilicia (1175âÂÂ1187).
He was the eldest son of Stephen, the third son of Leo I, lord of Armenian Cilicia. His mother was Rita, a daughter of Sempad, Lord of Barbaron. Roupen's father was murdered on February 7, 1165.
Roupen was in charge of Cilicia following the murder of his paternal uncle, Mleh on May 15, 1175.
On 4 February 1181/3 February 1182 he married Isabella of Toron, daughter of Humphrey III of Toron. Before Roupen's 1188 death, Levon became the new ruler.
# (4 February 1181 â 3 February 1182) Isabella of Toron, a daughter of Humphrey III of Toron and Stephanie of Milly