WASHINGTON — U.S. home prices rose at a slightly slower pace in the 12 months that ended in March, a sign that weak sales have begun to restrain the housing market’s sharp price gains.

Data provider CoreLogic says prices rose 11.1 percent in March compared with March 2013. Though a sizable increase, that was down a bit from February’s 12.2 percent year-over-year increase.

On a month-to-month basis, prices in March rose 1.4 percent from February. But CoreLogic’s month-to-month figures aren’t adjusted for seasonal patterns.

Home sales and construction have faltered since fall, slowing the economy. A harsh winter, higher buying costs and a limited supply of homes have discouraged potential buyers. Existing-home sales in March hit their lowest level in 20 months.