Following the blockade, Iran, a main rival of Saudi Arabia, offered its support to Doha, urging Qatar and neighboring Gulf countries to engage in dialogue to resolve their dispute.
Meanwhile, Qatar has said citizens of the states that have cut ties with the emirate will be allowed to stay in the country despite measures against its own nationals.
Al Sabah said that Qatar is ready to respond to the efforts made by H H Emir of Kuwait Sheikh Sabah Al Ahmed Al Jaber Al Sabah to reach an agreement.
But a Qatari diplomat said the crisis reflected a lack of US leadership.
Saudi Arabia's powerful Deputy Crown Prince Mohammed bin Salman discussed efforts to "counter terrorism and extremism" in a telephone call with U.S. Secretary of State Rex Tillerson on Sunday, state news agency SPA said. "(It) gives others the impression the USA does not know how to manage the relationship with its allies or is incapable".
Al-Khalifa said Erdogan explained to him that the Turkish military base in Qatar is not there to target any country, but to ensure the security of the region.
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On June 5, Saudi Arabia, the UAE and Bahrain cut their diplomatic relations with Qatar, closed their air, sea and land access to it and ordered Qatari citizens to leave their countries within two weeks, accusing the gas-rich peninsula state of sponsoring terrorist organizations, including Al Qaida-linked groups in the Syrian civil war, and the politics of Iran, which Qatar has repeatedly denied.
In his latest message supportive of the Saudi-led move, President Donald Trump on Friday said he backed the isolation of Qatar, saying Doha has historically "been a funder of terrorism at a very high level" and that has to stop.
But it was importing 80 percent of its food from bigger Gulf Arab neighbours before they cut ties and is now in talks with Iran and Turkey to secure food and water supplies.
"So far five planes carrying vegetables have been sent to Qatar, each carrying around 90 tonnes of cargo, while another plane will be sent today", Iran Air spokesman Shahrokh Noushabadi said.
The decision will come as a relief to the more than 11,000 people from Saudi Arabia, the UAE and Bahrain living in Qatar.
Mohammed al-Sada said in a statement: "circumstances in the region shall not prevent the state of Qatar from honouring its global commitment of cutting its oil production".