Book orders reached RON335 million, while the maximum accepted yield was 3.79%, central bank data showed.
The bond, which was launched in January 2013, was last reopened in January, when the ministry raised RON566.9 million at an average yield of 2.7% a year.
The issue will be reopened tomorrow in a bid to raise RON30 million at a supplementary non-competitive sale.
In August, the ministry plans to sell treasury bills and bonds worth a total RON2.6 billion, similar to the issuance plan in the previous month.