| Church: | Church of Constantinople |
| Archbishop Of: | Ecumenical Patriarch of Constantinople |
| Term: | 29 June 1662 – 21 October 1665 |
| Predecessor: | Parthenius IV of Constantinople |
| Successor: | Parthenius IV of Constantinople |
| Birth Date: | unknown |
| Death Date: | 14 October 1696 |
Dionysius III (Greek, Modern (1453-);: Διονύσιος; died 14 October 1696) was the Ecumenical Patriarch of Constantinople from June 29, 1662, to October 21, 1665. He had previously been bishop of Thessaloniki, Larissa (1652–1662) and Bursa.[1]