The UAE said on Tuesday (June 6th) that Qatar would need to provide a "guaranteed roadmap" before it would consider mending ties, AFP reported.
Along with neighbouring Saudi Arabia and its closest allies, the UAE severed relations with Qatar on Monday, suspending all flights and giving Qataris 14 days to leave in the biggest diplomatic crisis to hit the region in years.
"We need a guaranteed roadmap to rebuild confidence after our covenants were broken," UAE state minister for foreign affairs Anwar Gargash said on Twitter.
Gargash accused Doha of turning to "money and media and partisanship and extremism" in a series of tweets early Tuesday.
Qatar has denied the allegations.
Bahrain, Egypt, Yemen and the Maldives were also among the governments that severed ties with Qatar.
Meanwhile, Kuwait's Emir Sheikh Sabah al-Ahmad Al-Sabah left for Saudi Arabia on Tuesday for talks aimed at resolving the diplomatic crisis.
The official KUNA news agency said the emir left for the western port city of Jeddah at the head of a high-level delegation including the foreign and information ministers.
The emir was aiming to mediate in the dispute between Qatar and its Gulf neighbours led by Saudi Arabia, lawmakers in Kuwait City said earlier.
"We pray to God to help him succeed in achieving Gulf unity," veteran MP Ali al-Deqbasi said during a parliamentary session.
The Kuwaiti ruler played a pivotal role in mediating a compromise in a 2014 diplomatic dispute between Saudi Arabia, Qatar and other Gulf states.
Qatar's emir, Sheikh Tamim bin Hamad Al-Thani, has delayed a speech planned for broadcast on Al-Jazeera at the request of the Kuwaiti ruler, the Qatari foreign minister said.
Sheikh Sabah has urged his Qatari counterpart "to exercise restraint" and "give efforts aimed at containing tensions between brothers a chance", said the Kuwaiti news agency KUNA.