Banks offered RON950 million, but the ministry rejected all yields above 7.49% a year, central bank data showed.
At the latest similar auction July 7, the ministry sold roughly RON703 million in three-year paper at an annual yield of 7.09%.
The ministry plans to sell debt worth RON4 billion in August, slightly down from RON4.24 billion sold a month earlier.
So far this year, Romania sold around RON40.6 billion (EUR9.53 billion) in leu-denominated state notes. Additionally, two foreign currency bond auctions have brought the ministry EUR1.4 billion, while an international debt sale early June raised EUR1.5 billion. (EUR1=RON4.2567)