教宗亚纳大削三世（？－913年6月），原名不详，于911年9月至913年6月在位为罗马教宗。

Pope Anastasius III (died June 913) was Pope from April 911 to his death in 913. He was a Roman by birth. A Roman nobleman, Lucian, is sometimes recognized as his father, although other sources assert that he was the illegitimate son of his predecessor Pope Sergius III (904–911). Almost nothing is recorded of Pope Anastasius III, his pontificate falling in the period when Rome and the Papacy were in the power of Theophylact, Count of Tusculum, and his wife Theodora, who approved Anastasius III's candidacy. Under his reign the Normans of Rollo were evangelized.