Passage: After a United Nations Security Council resolution was vetoed by the U.S. three days earlier, Palestinian UN Ambassador Riyad Mansour said that the General Assembly would vote on a draft resolution calling for Trump’s declaration to be withdrawn. He sought to invoke Resolution 377, known as the "Uniting for Peace" resolution, to circumvent a veto. The resolution states that the General Assembly can call an Emergency Special Session to consider a matter "with a view to making appropriate recommendations to members for collective measures" if the Security Council fails to act.

Question: How many days before the veto?
three days