Yarbaşı (Arabic: إِسفِس; Kurdish: Hespîst;[2] Syriac: ܐܣܦܣ, romanized: Isfes)[3][a] is a village in the İdil District of Şırnak Province in Turkey.

[7] Isfes (today called Yarbaşı) is identified with Hiaspis mentioned by the Roman historian Ammianus Marcellinus in Res gestae in the 4th century AD along the frontier with the Sasanian Empire.

[9] The Syriac Orthodox maphrian Basil Solomon took refuge at Isfes after having fled Mosul in 1514 and remained there until his death in 1518.

[10] An attack by Muhammad Pasha of Rawanduz on Isfes resulted in the death of 80 men, including a priest and a notable, and the enslavement of a number of women and children in early 1834.

[14] After three days of fighting, the villagers were able to flee to Azakh after the priest ‘Abdallahad Jebbo managed to bribe the detachment commander Ilyas Chelebi and Isfes was subsequently looted and burned as they fled.