The ratio of bids to the amount offered was 3.31, which was the lowest since 3.13 at a three-month bill sale on Oct. 15, 2013.
A week ago, the Treasury auctioned three-month bills supply at an interest rate of 0.110 percent and a bid-to-cover ratio of 3.31.
Meanwhile, the Treasury auctioned $28 billion of six-month bills at an interest rate of 0.34 percent, which was the highest since June 2009.
Last week, it sold $26 billion of six-month debt supply at an interest rate of 0.285 percent.
The bid-to-cover ratio at the latest six-month T-bill auction was 3.69, down from prior week's 3.75.