The Greek government has done all it should at every level in an effort to find a mutually beneficial solution," government spokesman Gabriel Sakellaridis said.
On Thursday, Germany rejected a Greek proposal for a six-month extension to its euro zone loan agreement, saying it was "not a substantial solution" because it did not commit Athens to stick to the conditions of its international bailout.
"We are not discussing the continuation of the (bailout) program," Sakellaridis was quoted by Reuters as saying.
"The Greek government will maintain this stance today, although conditions have matured for a solution to be found at last."
The finance ministers of euro zone states agreed to hold their third meeting on the Greek debt crisis in Brussels on Friday in just over a week after Athens requested a six-month extension of loan agreements with rescue creditors that expire this month.