Rusa III  was king of Urartu.
He was called "Rusa Erimenahi" ("the son of Erimena").
He may have been the nephew or cousin of Rusa II.
V. Sargsyan."
On the Problem of the Succession of the Biainian Kings of the Ararat (Urartu) Kingdom in the Second Half of the 8th-the First Half of the 7th Century B.C." Fundamental Armenology.
2015.
http://www.fundamentalarmenology.am/datas/pdfs/178.pdf Little is known about his reign; his name was inscribed on a massive granary at Armavir and on a series of bronze shields from the temple of Khaldi found at Rusahinili, now held in the British Museum.Gwendolyn, Who's Who in the Ancient Near East, p. 137 There is considerable confusion over the identity of Rusa III, when he ruled, and his relationship to other kings or even the actual dates he ruled.
V. Sargsyan.
"On the Problem of the Succession of the Biainian Kings of the Ararat (Urartu) Kingdom in the Second Half of the 8th-the First Half of the 7th Century B.C." Fundamental Armenology.
2015.
http://www.fundamentalarmenology.am/datas/pdfs/178.pdf
Rusa was the father of Sarduri IV.
See also
List of kings of Urartu
References
