The G7 group of nations has failed to reach agreement over threatening new sanctions against Russia and Syria.
Foreign ministers were seeking a common position on the Syrian conflict, before the US secretary of state flies to Russia to try to persuade it to abandon its Syrian ally.
The nations agreed there was no solution to the Syria crisis with President Assad in power.
But UK proposals to target sanctions at senior military leaders were sidelined.
The diplomacy in the Italian town of Lucca follows the latest apparent use of chemical weapons in Syria.