Adarnase III (), of the Nersianid Dynasty, was a presiding prince of Iberia (Kartli, eastern Georgia) from c. 748 to 760.
Adarnase was a son of Prince Nerse I Nersiani by his wife, third daughter of Mirian of Kakheti.
The name Adarnase derives from Middle Persian ÃÂdurnarsÃÂh, with the second component of the word (Nase) being the Georgian attestation of the Middle Persian name Narseh, which ultimately derives from Avestan nairyà Â.saà Âya-. The Middle Persian name Narseh also exists in Georgian as Nerse. The name ÃÂdurnarsÃÂh appears in the Armenian language as Atrnerseh.
Originally a hereditary duke (eristavi) of Inner Iberia, he seems to have succeeded the Guaramid ruler Guaram III, whose son, Guaram IV was married to Adarnase's daughter. He was succeeded by his son, Nerse.
Adarnase's title of testifies to the degree of Byzantine influence in Georgia even though Iberia continued under the suzerainty of the Abbasid Caliphate.