Peter III, of the Cappai de Bas family, was the Judge of Arborea, reigning from 1335 CE until his death in 1347 CE. He was the son and successor of Hugh II assumed the throne on his father's death.

Peter III
Judge/King of Arborea
Reign1335–1347
PredecessorHugh II
SuccessorMarianus IV
Born1314
Died1347(1347-00-00) (aged 32–33)
SpouseConstance of Saluzzo
Names
  • Peter De Serra Bas
HouseCervera (Serra Bas branch)
FatherHugh II, King of Arborea
MotherBenedetta

Peter married Constance (died 18 February 1348), daughter of Thomas II of Saluzzo, towards 1326. He reigned in the shadow of his chancellor, Guido Cattaneo, Archbishop of Arborea, and the doctor of civil and penal law, Filippo Mameli, a canon of Tramatza.

When Alfonso died in 1336, Peter's brother Marianus paid homage to Peter IV of Aragon on his behalf. On 22 September 1343, he obtained from Pope Clement VI permission to found a monastery of the Clarisse.

Preceded by Judge of Arborea
1336–1347
Succeeded by