Finland threatened to block the purchase of sovereign debt by the European rescue fund.
The threat casts doubt on the agreement reached at the EU summit last week to save the euro zone members to be drawn into the debt crisis of the block.
The Finnish Prime Minister Jykri Katainen, told Parliament that decisions on these purchases require unanimity, something not possible with the Finnish opposition.
Finland calls for strict budgetary discipline and conditions of the rescue packages for countries in the euro zone.
This is one of the few EU countries that still has a triple A credit rating