The Ad Hoc Liaison Committee (AHLC), which is responsible for coordinating international support for the Palestinians and is chaired by Norway, was set to meet in Oslo on June 25.
But Norwegian foreign ministry spokesman Frode Andersen said: "The situation is not conducive to having an AHLC meeting at this point."
He told AFP by email that the decision was made in coordination with the Palestinians, the Israelis, the EU and the US.
He did not give a specific reason for the delay, nor say when a new meeting would be held.
But it comes after Israel accused the Palestinian militant group Hamas of kidnapping three teenagers who went missing in the West Bank last week, triggering a huge manhunt.
To Israel's dismay, Hamas and the Palestine Liberation Organisation (PLO) reached a landmark reconciliation deal which led to the formation of a unity government this month.