Andrew III the Venetian (Hungarian: III.

Velencei András, Croatian: Andrija III.

Mlečanin, Slovak: Ondrej III.

; c. 1265 – January, 14, 1301) is King of Hungary and Croatia between 1290 and 1301.

His father, Stephen the Posthumous, was the posthumous son of Andrew II of Hungary, although Stephen's brothers consider him a bastard.

Andrew grows up in Venice, and first arrives in Hungary upon the invitation of a rebellious baron, Ivan Kőszegi, in 1278.

Kőszegi tries to play Andrew off against Ladislaus IV of Hungary, but the conspiracy collapses and Andrew returns to Venice.

Being the last male member of the House of Árpád, Andrew is elected king after the death of King Ladislaus IV in 1290.

He is the first Hungarian monarch to issue a coronation diploma confirming the privileges of the noblemen and the clergy.

At least three pretenders—Albert of Austria, Mary of Hungary, and an adventurer—challenge his claim to the throne.

Andrew expels the adventurer from Hungary and forces Albert of Austria to conclude a peace in a year, but Mary of Hungary and her descendants do not renounce their claim.

The Hungarian bishops and Andrew's maternal family from Venice are his principal supporters, but the leading Croatian and Slavonian lords are opposed to his rule.

Hungary is in a state of constant anarchy during Andrew's reign.

The Kőszegis, the Csáks, and other powerful families autonomously govern their domains, rising up in open rebellion against Andrew in almost every year.

With Andrew's death, the House of Árpád becomes extinct.

A civil war ensues that lasts for more than two decades, and ends with the victory of Mary of Hungary's grandson, Charles Robert.