Abu Torab (Persian: ابوتراب), better known by his dynastic name of Ismail III (اسماعیل), was a Safavid prince, who reigned as a figurehead under the authority of Ali Mardan Khan Bakhtiari briefly from 1750 to 1751, and then under the Zand ruler Karim Khan Zand from 1751 till his death in 1773.

Abu Torab's father was Mirza Morteza, who was a former court official, and his mother was a daughter of the former Safavid king (shah) Sultan Husayn (r. 1694–1722).

[1] Ali Mardan then took the title of Vakil-e daulat ("deputy of the state")[2] as the head of the administration, while Abu'l-Fath maintained his post as governor of Isfahan, and Karim Khan was appointed commander (sardar) of the army, and was given the task of conquering the rest of Iran.

Ali Mardan eventually broke the alliance by killing Abu'l-Fath and extracting heavy tax on the inhabitants.

[3] After Karim Khan's accession as vakil (regent) in the same year, Ismail was kept in safe custody at the stronghold of Abadeh, where lived till his death, in 1773.