Puzur-Sin was an Assyrian vice regent who according to the Assyrian King List was responsible for driving out Asinum the Amorite vassal king of the Babylonians from Assyria, and allowing the native Ashur-dugul to seize the throne.[1][2]
A period of civil war followed this event which ended Babylonian and Amorite influence in Assyria by 1720 BC.