The pope is expected to be in Asia during a trip to Japan next year.
During 2017, Iran was Turkey's top crude oil source, accounting for 11.5 million tonnes of its total purchases nearing 26 million tonnes, followed by Iraq and Russia.
Overnight, Turkish crime scene investigators entered the Saudi consulate in Istanbul, the last place Khashoggi was seen before vanishing.
Iran, which says its missile program is purely defensive, has threatened to disrupt oil shipments through the Strait of Hormuz in the Gulf if Washington tries to strangle Tehran’s oil exports.
Palestinian education officials and school students attempted to resist the closure decision, but were confronted by the IDF, who threw tear gas bombs at them.
Trump dispatched Secretary of State Mike Pompeo to meet King Salman over the case that has strained the Americans' relationship with the Saudis, carefully cultivated by the US president.
The Syrian government retook the area around the Nassib border crossing with Jordan in July during a Russian-backed offensive to drive rebels from their stronghold in southwest Syria.
Rouhani accused the Americans of using psychological and economic warfare and questioning the legitimacy of the Islamic Republic.