United Nations deputy spokesman Farhan Haq told reporters Monday that Guterres "has been in touch with people as have other United Nations officials".
When the ties were severed, people in Qatar started panicking that the country could run out of food.
Both Saudi and Qatari officials appear to be seeking support from Ethiopia.
The diplomatic spat which has threatened the stability of the Gulf is one of the worst in decades, experts have warned.
Erdogan added he would hold three-way phone talks on the crisis later Tuesday with French President Emmanuel Macron and Qatar's emir, Sheikh Tamim bin Hamad Al-Thani.
Foreign Minister Adel al-Jubeir said Tuesday before a meeting with Secretary of State Rex Tillerson that Qatar's ports and airports are open.
Pakistan has close ties with the kingdom but also business ventures in Qatar.
Erdogan: Qatar Crisis 'Inhumane', Saudi King Should 'Resolve Issue'
This has disrupted imports of food and other materials and caused many foreign banks to scale back business with Qatar . Turkey and Iran have stepped into the gap, raising the specter of a reshuffling of alliances in the Gulf region.
Iran's Islamic Revolutionary Guards, a powerful branch of the country's military, vowed revenge for the attacks and blamed them on longstanding regional rival Saudi Arabia. They accuse Qatar of supporting terrorist groups, charges denied by Doha. Most of the dairy supplied to Doha previously came from Saudi Arabia.
Doha is a major worldwide travel hub, but flagship carrier Qatar Airways now flies increasingly over Iran and Turkey after being blocked elsewhere in the Middle East.
In London, British foreign minister Boris Johnson called for calm and said he would meet this week with his counterparts from Saudi Arabia, Kuwait and the U.A.E.
Nawaz Sharif's office issued a statement following his return from Saudi Arabia, where the Pakistani premier, accompanied by army chief Gen.
Erdogan dubbed the Saudi-led actions as tantamount to a "death penalty" imposed on Qatar, which he said was the target of a defamation campaign.
Iran's flag carrier is flying vegetables to Qatar after Arab nations cut land, sea and air routes to the energy-rich Gulf nation.
Ministry Spokesman Bahram Ghasemi tells reporters in a weekly news conference: "These countries should try to settle their differences at the negotiating table in a positive and comprehensive process".
Trump to host new South Korean president at White House
The drone was believed to have crashed because it ran short of fuel while returning to North Korea. Of the hundreds of photos on the memory chip, at least 10 were an overview of the THAAD site.
The diplomatic row between Qatar and its Arab neighbors is gradually enveloping African Muslim-majority nations.
On June 5, the countries cut diplomatic ties to Qatar and ordered all Qataris out within 14 days. France has economic and military ties with Qatar and other Gulf states.
Qatar announced on Monday that it had launched direct shipping services to ports in Oman in a bid to bypass the Gulf "blockade".
Dubai, part of the UAE, is also massively important for the import and export of goods because of its huge port Jebel Ali.
Monday, Eritrea expressed support for Saudi Arabia and its allies after they cut ties with Qatar.
Qatar's port authority says its cargo will go through Sohar, as well as Oman's port at Salalah.
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