"Our friends once again expressed that America is now alone on this issue, especially in the voting held at the United Nations today," Fidan told Anadolu and Turkish national broadcaster TRT in an exclusive interview in the US.
Fidan was in the capital Washington, D.C. along with his counterparts after they were assigned by a joint Arab-Islamic extraordinary summit last month to press for a cease-fire in Gaza, which has been under Israeli attacks for over two months.
The summit mandated the foreign ministers of Türkiye, Palestine, Saudi Arabia, Indonesia, Egypt, Jordan, Qatar and Nigeria to take international action to stop the war in Gaza and achieve lasting peace.
The committee separately met with US Secretary of State Antony Blinken, with think tanks, media organizations and politicians.
During their meeting with Blinken, Fidan said the group, which has become "almost the spokesperson and interpreter" of world public opinion, "frankly" expressed the tragedy in Gaza and its effects.
'American political system is now helpless on issues related to Israel'
Turning to the US veto of the UN Security Council resolution on Gaza, Fidan said: "As we expressed in our meetings today, the American political system is now helpless on issues related to Israel. Therefore, Israel acts recklessly on this issue and continues its oppression."
The US on Friday vetoed the resolution, which was put forward by the United Arab Emirates (UAE) and backed by over 90 member states. There were 13 votes in favor and the UK abstained.
Noting that the contact group will continue its work on Gaza "without interruption," Fidan said it will continue to be the spokesperson of the world public opinion's feelings on this issue.
He added that the contact group will hold meetings with Canadian Prime Minister Justin Trudeau and Canadian Foreign Minister Melanie Joly on Saturday.
After Canada, he said the contact group will have meetings in Norway next week and later in Geneva.
Bilateral talks with Blinken
Speaking about his bilateral meeting with Blinken, Fidan said Türkiye brings up its position regarding the situation in Gaza "very clearly" with the US.
"We express to them very clearly the seriousness of the situation here, that there is no more tolerance, and our stance on what steps need to be taken in this regard," he added.