The UAE delegation has arrived at the Gulf Cooperation Council summit in Riyadh.
Sheikh Mohammed bin Rashid, UAE Vice President and Ruler of Dubai, was among the delegation.
Saudi Arabia's King Salman greeted the Emirati delegation and their Omani counterparts.
The GCC states – Bahrain, Kuwait, Oman, Saudi Arabia, the UAE and Qatar – come together every year to discuss trade and security co-operation.
Emir Tamim Al Thani of Qatar will not be attending this year's summit, Saudi officials confirmed, dashing hopes of a solution to a dispute which included three GCC members – Saudi Arabia, the UAE and Bahrain – cutting ties with Doha in 2017.
The three countries accuse Qatar of interfering in their internal affairs and of supporting extremist groups across the region.