Al-Mundhir III ibn al-Nu'man (Arabic: المنذر بن النعمان), also known as Al-Mundhir ibn Imri' al-Qays (المنذر بن إمرئ القيس) (died 554) was the king of the Lakhmids in 503/505–554.

These started before he was crowned a king, during the Anastasian War, with a raid in Palaestina Salutaris and Arabia Petraea in the year 503, capturing a large number of Romans.

[1] Mundhir's raids covered the area between Euphrates from the east up to Egypt in the west[2] and Najd southward, where in 521 The Himyarites Responding to the cry of help from local Arab tribes Led a campaign against Lakhmids forcing them to withdraw from Najd.

Afterward, he marched towards Arzona and Nisibis, despoiling and ravaging the cities before continuing to Apamea and Chalcedon.

Al-Mundhir was killed in the battle of Yawm Halima with the Ghassanids under al-Harith ibn Jabalah in June 554.