Sheshonq ruled for around fifty-two years, an exceptionally long period of time for the kings in the Third Intermediate Period, which was marked by overlapping reigns and shared power. Sheshonq III accepted the 23rd Dynasty king, Pedibasted I, as an equal king in Egypt and they divided the country between them. At the same time, rulers of both the 22nd Dynasty and 23rd Dynasty were ruling in Central Egypt, and the delta also split into several principalities.

A famine is recorded in the 49th year of his reign, but little else is recorded about him.

His tomb was found in Tanis and is similar to that of Psusennes I and Osorkon II.

pharaohs

Sheshonq I
Nimlot I
Osorkon I
Takelot
Sheshonq II
Osorkon II
Takelot II
Sheshonq III
Pami
Sheshonq V
Osorkon IV