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 French protectorate of Tunisia, officially the Regency of Tunis and commonly referred to as simply French Tunisia, was established in 1881, during the French colonial empire era, and lasted until Tunisian independence in 1956.