During the Qatar diplomatic crisis, Iran provided diplomatic and economic support to Qatar.
On June 5, the day that the crisis erupted, Iran asked the Arab nations to settle their dispute through dialogue.
After Saudi Arabia and its Persian Gulf allies blocked Qatar economically, Iran sent food supplies, amounting to 1,100 tons of fruit and vegetables and 66 tons of beef, to Qatar on a daily basis.
On 25 June, Iranian president Rouhani denounced the "siege" on Qatar, and in a phone call with sheikh Tamim, said that "Tehran will stand by Qatar's government".
He also noted that Iran's airspace was open to Qatari aircraft.

On 23 August 2017, it was announced that Qatar would be returning its ambassador to Iran.
In a press statement released by Qatar's foreign ministry, Qatar expressed its willingness to improve bilateral ties with Iran.

On 26 August 2018, during a phone conversation between Emir of Qatar and Iranian President Rouhani, Sheikh Tamim bin Hamad Al-Thani stated that “Thanks to the integrity and solidarity of Qatari people and cooperation and help of friend countries, especially Iran, we have overcome the issues of the unjust, cruel siege and we will never forget Iran’s stances in this regard.”
During the Qatar diplomatic crisis, Iran provided diplomatic and economic support to Qatar. On June 5, the day that the crisis erupted, Iran asked the Arab nations to settle their dispute through dialogue. After Saudi Arabia and its Persian Gulf allies blocked Qatar economically, Iran sent food supplies, amounting to 1,100 tons of fruit and vegetables and 66 tons of beef, to Qatar on a daily basis. On 25 June, Iranian president Rouhani denounced the "siege" on Qatar, and in a phone call with sheikh Tamim, said that "Tehran will stand by Qatar's government". He also noted that Iran's airspace was open to Qatari aircraft.
On 23 August 2017, it was announced that Qatar would be returning its ambassador to Iran. In a press statement released by Qatar's foreign ministry, Qatar expressed its willingness to improve bilateral ties with Iran.
On 26 August 2018, during a phone conversation between Emir of Qatar and Iranian President Rouhani, Sheikh Tamim bin Hamad Al-Thani stated that “Thanks to the integrity and solidarity of Qatari people and cooperation and help of friend countries, especially Iran, we have overcome the issues of the unjust, cruel siege and we will never forget Iran’s stances in this regard.”
Iran–Qatar relations