A victory by the opposition in Turkey's elections would increase concerns for Syrians that they could be forced to return to the war-torn country they fled.
Erdogan received 49.4% of votes in the Turkish presidential election. Rival Kilicdaroglu had 44.96%.
If neither presidential candidate gets more than 50 percent of the vote, then a run-off will take place on May 28.
Ahead of Sunday's elections, a cost of living crisis is now hitting Erdogan's support in the southeast as elsewhere, threatening his prospects in a tough battle to maintain power.
REGIONAL AFFAIRS: The AKP has started to pull out all the stops and is returning to its roots of extremism to win votes.
Turkey's Interior Minister Süleyman Soylu claims the West, particularly the US, is using the tightly contested May elections to stage a political coup.
IS selected al-Qurashi as its leader in November 2022 after the previous IS leader was killed in an operation in southern Syria.