The summit had been billed as a last chance to stop Greece crashing out, but was scrapped as eurozone finance ministers returned today to marathon talks after failing overnight to overcome distrust with Greece's leftist government.
With Greece facing growing misery from capital controls and fears its banks could collapse within days, a meeting of the leaders of the 19 countries that use the euro was still due to go ahead in Brussels on Sunday.
The talks yesterday ended with deep divisions about whether to trust Greece's radical Prime Minister Alexis Tsipras with a third bailout worth more than 80 billion euros (USD 89 billion), following months of wrangling.
Fiscal hawks Germany floated a plan for a temporary "Grexit" from the euro while Finland reportedly decided flat out not to accept a new Greek rescue programme, causing panic.
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Their downbeat assessment came despite Greece's international creditors calling Athen's new proposals a positive step forward after months of wrangling on a follow-up to two previous bailouts in 2010 and 2012 worth 240 billion euros.
In Greece, there is growing alarm at capital controls that have closed banks and rationed cash at ATMs for nearly two weeks, leading to fears that food and medicine will soon run short.
Economy Minister Giorgos Stathakis warned the restrictions will likely stay in place for "months" even if there is a deal.
Greek newspapers expressed alarm, with the headline of the Eleftheros Typos in Athens saying: "The future of Greece on a razor's edge" and asking "what will happen in the case of the nightmare of a Grexit?"
But a lack of trust in Greek authorities was blocking any agreement by the eurozone ministers, who repeatedly called for further steps from Athens to show commitment to reforms.
Italian Economy Minister Pier Carlo Padoan urged the Greek government to take steps as early as Monday to prove it would stick to its word.