James III (also Jaume or Jaime; 5 April 1315 – 25 October 1349), called the Rash or the Unfortunate, was King of Majorca from 1324 to 1344. He was the last ruler of independent Majorca.
James was born at Catania, Sicily. His parents were Ferdinand, the second son of James II of Majorca, and Isabella of Sabran. Margaret of Villehardouin, James's maternal grandmother, fought to reclaim the Principality of Achaea from the Angevins of Naples. Isabella died soon after the childbirth, and James was proclaimed Prince of Achaea under the guardianship of his father. Ferdinand invaded the Morea in an effort to bring the principality under his control, but was killed in 1316. Despite this setback, from 1331 the feudal lords of Achaea began to recognise the rights of James, and in 1333 the recognition was total, though the Angevin heirs of Philip I of Taranto continued to press their claim.
Upon the death of his uncle Sancho in 1324, James inherited the crown of Majorca. His uncle Philip ruled the kingdom as regent until 1329. In order to establish friendly relations with the Crown of Aragon, he married Constance, daughter of Alfonso IV of Aragon. Though the kings of Majorca traditionally swore an oath of fealty to the kings of Aragon, James claimed that no king could have lordship over any other king. He patronised the University of Montpellier, which lay within his continental domains, and the legal scholars of that institution defended his rights as king.