Saudi Foreign Minister Prince Faisal bin Farhan told reporters after the summit that diplomatic relations would be restored in full with Qatar, although no time frame was given.
Saudi Arabia and Bahrain are primarily concerned about Qatar’s ties with Iran.
The rift between Abu Dhabi and Doha has been deepest, with the UAE and Qatar at sharp ideological odds.
Egypt’s foreign minister also attended the meeting of the six-nation Gulf Cooperation Council, which comprises Saudi Arabia, the UAE, Bahrain, Kuwait, Oman and Qatar.
Qatar's only land border with Saudi Arabia, which it relied on for the import of dairy products, construction materials and other goods, has been mostly closed since June 2017.