| Henry III | |
| Duke of Brabant Duke of Lothier Imperial Vicar | |
| Spouse: | Adelaide of Burgundy |
| Issue: | Henry IV, Duke of Brabant John I, Duke of Brabant Godfrey, Lord of Aarschot Marie of Brabant, Queen of France |
| Noble Family: | House of Reginar |
| Father: | Henry II, Duke of Brabant |
| Mother: | Marie of Hohenstaufen |
| Birth Place: | 1230 |
| Death Date: | 28 February 1261 |
| Death Place: | Leuven |
| Religion: | Roman Catholicism |
Henry III of Brabant (1230 - February 28, 1261, Leuven) was Duke of Brabant between 1248 and his death. He was the son of Henry II of Brabant and Marie of Hohenstaufen. He was also a trouvère.
The disputed territory of Lothier, the former Duchy of Lower Lorraine, was assigned to him by the King Alfonso X of Castile, a claimant to the German throne. Alfonso also appointed him imperial vicar to advance his claims on the Holy Roman Empire.
In 1251, he married Adelaide of Burgundy (1233 - October 23, 1273), daughter of Hugh IV, Duke of Burgundy and Yolande de Dreux, by whom he had four children:
On February 26, 1261, Henry III signed his will, which included a clause threatening to banish Jewish people from Brabant unless they ceased the practice of usury, albeit only after his death. He died two days later. His wife Adelaide, acting as regent since Henry IV was incapable of ruling, never enforced this policy laid out in the will, and the Jews were able to stay.[3]