Ali III ibn al-Husayn commonly known as Ali III Bey was the Husainid Bey of Tunis from 1882 until his death. He was the first ruler under the French protectorate.

The Mejba Revolt was a rebellion in Tunisia against the doubling of an unpopular poll tax imposed on his subjects by Sadok Bey. The most extensive revolt against the rule of the Husainid Beys of Tunis