Üçyol (Kurdish: Seyderi, lit.

'three gates'; Syriac: Sēdäri)[2][a] is a neighbourhood in the municipality and district of Nusaybin, Mardin Province in Turkey.

[1][5] In 1915, Sēdäri (today called Üçyol) was inhabited by 10 Assyrian families.

[6] They adhered to the Syriac Orthodox Church.

[7] Amidst the Sayfo, survivors took refuge at the Mor Malke Monastery.