Sharwin III (Persian: شروین), was the fourteenth ruler of the Bavand dynasty briefly in 986. He was the brother and successor of al-Marzuban.
Sharwin was the son of Rustam II. In 986, after the death of Rustam II, Sharwin's brother al-Marzuban ascended the Bavandid throne. There have been several confusions about the reign of the Bavandid kings after the death of Rustam II. In 986, al-Marzuban is no longer mentioned as the ruler of the Bavand dynasty, and Sharwin III is instead mentioned as the ruler of the dynasty. A certain Shahriyar III is later mentioned as the ruler of the Bavand dynasty in the following year. Nothing more is known about Sharwin III.
. The Cambridge History of Iran, Volume 4: From the Arab Invasion to the Saljuqs . 1975 . Cambridge University Press . Cambridge . Frye . R.N. . Wilferd Madelung . The Minor Dynasties of Northern Iran . 198–249 . 978-0-521-20093-6 . https://books.google.com/books?id=hvx9jq_2L3EC&pg=PA198.