Alfonso III d'Este
| Alfonso III d'Este | |
|---|---|
| Duke of Modena and Reggio | |
| Reign | 11 December 1628 – 24 July 1629 |
| Predecessor | Cesare d'Este |
| Successor | Francesco I d'Este |
| Born | 22 October 1591 Ferrara, Duchy of Ferrara |
| Died | 24 May 1644 (aged 52) Castelnuovo di Garfagnana |
| Spouse | |
| Issue | Margherita, Duchess of Guastalla Francesco, Duke of Modena Anna Beatrice, Duchess of Mirandola Cardinal Obizzo Cardinal Rinaldo |
| House | Este |
| Father | Cesare d'Este, Duke of Modena |
| Mother | Virginia de' Medici |
| Religion | Roman Catholicism |
Alfonso III d'Este (22 October 1591 – 24 May 1644) was Duke of Modena and Reggio from 1628 to 1629. He was the husband of Princess Isabella of Savoy, daughter of Charles Emmanuel I, Duke of Savoy and his wife Infanta Catherine Michelle of Spain.