Demand amounted to RON334 million and the ministry allocated just two thirds of its initial target of RON300 million.
Romania last sold October 2030 bonds in July at an average yield of 4.26%.
Romania's finance ministry on Monday raised 201 million lei (EUR41.5 million) selling treasury bonds maturing in October 2030 at an average yield of 3.94% and a maximum yield of 3.96%, central bank data showed.