The European Central Bank (ECB) decided not to raise the amount of emergency funding (ELA) on Wednesday. The amount the Greek central bank can lend its banks totals around €89 billion.
The ECB wants to await the outcome of the Sunday's referendum.
The Greek government last Sunday announced its decision to shut the country's banks and to impose capital controls to avert the collapse of its financial system. Banks will be closed until July 06.
Daily cash withdrawals has been limited to 60 euros and payments and transfers abroad has been banned.