Borrell made the remarks in a recent telephone conversation with Russian Foreign Minister Sergey Lavrov, the EU's external action service (EEAS) said in a press release, the China Daily reported on Saturday.
Talking to Lavrov, he reaffirmed his determination to continue to work with Russia, the other remaining participants of the Joint Comprehensive Plan of Action (JCPOA) and the international community to preserve the agreement.
The EU's external action service announced on Friday that a meeting of the Joint Commission of the JCPOA will take place in Vienna, Austria on Sept. 1, attended by delegates of China, France, Germany, Russia, the United Kingdom and Iran.
Early on Thursday, the US sent a letter to the UN Security Council requesting to initiate the "snapback" mechanism, which allows a participant to the JCPOA to seek the reimposition against Iran of the multilateral sanctions lifted in 2015 in accordance with resolution 2231, adopted by the UN Security Council.
Borrell said in a statement on Thursday night that the US had lost ground to trigger the "snapback" mechanism as it withdrew from the agreement in 2018.
"As coordinator of the JCPOA Joint Commission I will continue to do everything possible to ensure the preservation and full implementation of the JCPoA by all," said Borrell, underlining that the JCPOA remains a key pillar of the global non-proliferation architecture, contributing to regional security.