Kayumarth III (Persian: کیومرث), was the fifth ruler of the Paduspanid branch of Kojur.
After eighteen years, Kayumarth managed to flee from prison, and had his father poisoned.
However, the people of Mazandaran quickly rose in revolt against him, and had him deposed in favor of Kayumarth.
During Kayumarth's reign, his daughter married the Marashiyan Mir Qewam al-Din Marashi.
This biography of an Iranian ruler or member of a royal family is a stub.