It was not immediately clear when it could be put to a vote.
The three countries circulated the draft text, said diplomats, and asked members to share their comments by Monday evening.
A resolution needs at least nine votes in favour and no vetoes by the United States, France, Britain, Russia or China to pass.
The world awaited Iran’s response on Sunday after President Donald Trump said the US had “obliterated” Tehran’s key nuclear sites, joining Israel’s assault against its Middle East rival in a significant new escalation of conflict in the region.
Iran requested the UN Security Council meeting, calling on the 15-member body “to address this blatant and unlawful act of aggression, to condemn it in the strongest possible terms”.
Israel’s UN Ambassador Danny Danon said in a statement on Sunday that the US and Israel “do not deserve any condemnation, but rather an expression of appreciation and gratitude for making the world a safer place”. (Reuters)