TEHRAN — The 120-nation Nonaligned Movement handed its host Iran a diplomatic victory Friday, unanimously decreeing support for the disputed Iranian nuclear program and criticizing the US-led attempt to isolate and punish Iran with unilateral economic sanctions.

The Tehran Declaration document not only emphasizes Iran’s right to peaceful nuclear energy but to ownership of a full nuclear fuel cycle, meaning uranium enrichment, a matter of deep dispute.

But the group’s communique, issued by Iranian state media at the end of its annual meeting, omitted any mention of support for Syria, Iran’s vital Middle East ally, which appeared to reflect a view among many members that the Syrian government’s attempt to crush the uprising there was indefensible.

The conspicuous omission of Syria from the document, called the Tehran Declaration, followed a dramatic day of maneuvering by Iran’s delegation to secure some kind of support for Syria’s government, diplomats said, as the supreme leader, Ayatollah Ali Khamenei, and his aides were criticizing foreign backing of Syrian rebels.