The failure of eurozone ministers to reach a deal to give Greece its latest bailout payment threatens the whole bloc, leaders have said.
Following nearly 12 hours of talks in Brussels, the Eurogroup said it needed more time for technical work.
Greek Prime Minister Antonis Samaras said: “It’s not only the future of our country, but the stability of the entire eurozone [that is at stake].”
France’s finance minister insisted they were a “whisker” away from a deal.
The chairman of the Eurogroup, Jean-Claude Juncker, said ministers would meet again next week.
“Greece did what it had to do, and what it had pledged to do… whatever technical difficulties in finding a technical solution do not justify any negligence or delay,” Mr Samaras said.