| Type: | Catholicos-Patriarch of the Church of the East |
| Honorific-Prefix: | Mar |
| Shimun XIV Shlemon | |
| His Holiness | |
| Church: | Church of the East (modern Assyrian Church of the East) |
| Diocese: | Patriarchal Diocese of Qodshanis |
| See: | Holy Apostolic See of Seleucia-Ctesiphon |
| Enthroned: | 1740 |
| Ended: | 1780 |
| Predecessor: | Shimun XIV Shlemon |
| Successor: | Shimun XVI Yohannan |
| Rank: | Catholicos-Patriarch |
| Birth Place: | Qodshanis, Hakkari, Ottoman Empire |
| Death Date: | 1780 |
| Death Place: | Qodshanis, Hakkari, Ottoman Empire |
| Nationality: | Assyrian (Ottoman) |
| Religion: | Eastern Christian, Church of the East |
| Residence: | Qodshanis, Hakkari, Ottoman Empire |
Mar Shimun XV Maqdassi Mikhail was the Catholicos-Patriarch of the Church of the East of the Shem'on line (based in Qodshanis) from 1740 until 1780.