Adad-nīrārī III (also Adad-nārārī, meaning "Adad (the storm god) is my help") was a King of Assyria from 811 to 783 BC.

[nb 1] Adad-nīrārī was a son and successor of king Shamshi-Adad V, and was apparently quite young at the time of his accession, because for the first five years of his reign, his mother Shammuramat[3] was highly influential, which has given rise to the legend of Semiramis.

[citation needed] Adad-nīrārī's youth, and the struggles his father had faced early in his reign, caused a serious weakening of Assyrian rulership over their indigenous Mesopotamia, and made way for the ambitions of officers, governors, and local rulers.

According to Adad-nīrārī's inscriptions, he led several military campaigns with the purpose of regaining the strength Assyria enjoyed in the times of his grandfather Shalmaneser III.

According to the eponym canon, he campaigned in all directions until the last of his 28 years of reign (783 BC), and he was the builder of the temple of Nabu at Nineveh.