|King of Kings of Iran and Aniran|
|Shahanshah of the Sasanian Empire|
|Reign||457 – 459|
|House||House of Sasan|
Hormizd III (Middle Persian: 𐭠𐭥𐭧𐭥𐭬𐭦𐭣; New Persian: هرمز سوم), was the seventeenth king (shah) of the Sasanian Empire, ruling briefly from 457 to 459. He was the son and successor of Yazdegerd II (r. 438–457). His reign was marked by the rebellion of his younger brother Peroz I, who with the aid of one the Seven Great Houses of Iran, the House of Mihran, and the eastern neighbours of the Sasanians, the Hephthalites, had him captured and executed.
The name of Hormizd (also spelled Ōhrmazd, Hormozd) is the Middle Persian version of the name of the supreme deity in Zoroastrianism, known in Avestan as Ahura Mazda. The Old Persian equivalent is Auramazdā, whilst the Greek transliteration is Hormisdas.
Hormizd III was the eldest son and heir of the Sasanian shah Yazdegerd II, and governed the eastern province of Sakastan during his fathers reign. The province was far away from the imperial court in Ctesiphon, and had since its conquest by Ardashir I (r. 224–240) been governed by Sasanian princes, who held title of sakanshah ("king of the Saka"). When Yazdegerd I died in 457, Hormizd ascended the throne at Ray. His younger brother Peroz I, with the support of the powerful Mihranid magnate Raham Mihran, fled to the northeastern part of the empire and began raising an army in order to claim the throne for himself. The empire thus fell into a dynastic struggle and became divided; the mother of the two brothers, Denag, temporarily ruled as regent of the empire from its capital, Ctesiphon. According to eastern sources, Peroz was more worthy for the throne than Hormizd, who is called unjust. Only the anonymous source known as the Codex Sprenger 30 describes Hormizd as the "braver and better", whilst describing Peroz as "more learned in religion".
The Arsacid ruler of Caucasian Albania, Vache II (r. 444–463), who was the nephew of the two brothers through his mother, and had been forced to convert to Zoroastrianism by Yazdegerd II, took advantage of the dispute by declaring independence and reverting to Christianity. Peroz later went to the domains of the Hephthalite monarch, who agreed to support him with soldiers in his struggle for the throne. In 459, Peroz, with Hephthalite and Mihranid assistance, led an army against Hormizd and defeated him. According to some sources, Hormizd was pardoned and spared by his brother. However, this is most likely a legend, due to being contradicted by other sources, which state Peroz had Hormizd and three members of his family killed. Peroz I afterwards fully incorporated Sakastan into the empire by appointing an aristocrat from the House of Karen as governor. Hormizd was thus the last person to wield the title of sakanshah. No coins minted during Hormizd's reign has been found.
Hormizd was survived by his two daughters, who were:
- Balendukht, the wife of Vakhtang I, the ruler of Iberia. She bore the latter a son named Dachi.
- An unnamed daughter, who was the wife of Varsken, Viceroy of Gugark and later Caucasian Albania.
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| King of kings of Iran and Aniran
457 – 459