‘‘What the Greeks have asked for, half a year or two years, that’s not doable,’’ said Roesler, who is also the vice chancellor in Angela Merkel’s coalition government. He added that ‘‘time is always money’’ and all parties had agreed that additional funds for Greece weren’t up for debate.

Roesler, the leader of Germany’s pro-business Free Democratic Party, has long taken a hard line on Greece. Last month, he caused an outcry in Greece by suggesting the idea of the country leaving the 17-nation eurozone had ‘‘lost its horror.’’

Those comments appeared to put him at odds with Merkel, who has always insisted that Greece should remain in the euro.