However, Kuwait appeared in recent days to secure promises from the GCC to attend its annual high-level summit.
Sheikh Sabah Al Khaled al-Hamad Al Sabah, Kuwait's foreign minister, while opening the preliminary meeting, said the GCC's unity and solidarity remain intact despite "various challenges and trials", the Kuwait News Agency (KUNA) said.
However, according to latest reports, the Saudi Minister of Foreign Affairs Adel al-Jubeir has arrived in Kuwait.
On 5 June, Saudi Arabia, Bahrain, the United Arab Emirates and Egypt abruptly cut all ties with Qatar over accusations Doha supported extremism and was close to Shia Iran.
The International Union of Muslim Scholars (IUMS) statement comes on the eve of the Gulf Cooperation Council (GCC) summit scheduled for Tuesday and Wednesday in Kuwait, amid a crisis in the region.
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It will be the first gathering of officials from the GCC member- states since a major Gulf crisis emerged six months ago.
It was not immediately known if the foreign ministers and the leaders at the summit will discuss the worst political dispute in the GCC's 36-year history. Qatar has long denied funding extremists but it restored full diplomatic ties with Iran during the crisis. It wasn't immediately clear if Bahrain sent a representative. Sheikh Sabah has flown between Gulf capitals carrying messages.
"I will attend the ministerial council tomorrow and the emir will attend the summit", said the minister. Flags of the six GCC nations flew along the road running past it all the way to the airport, with giant billboards also welcoming the GCC countries.
A similar dispute involving Qatar erupted in 2014.
The US, which has some 10,000 troops stationed at Qatar's sprawling al-Udeid Air Base as part of its campaign against the Islamic State group and the war in Afghanistan, also has sought to end the crisis. However, President Donald Trump in the meantime made comments seemingly supporting the Arab nations' efforts at isolating Qatar, complicating those efforts.