Hill is not expected to be on the bench for the Terps' game against Temple this morning or the home game with Duke on Wednesday night "pending further investigation," the school said.
Terps coach Mark Turgeon opened his regular media availability by announcing the arrest but did not take questions about Hill.
Hill, who turned 33 Thursday, was arrested at 1:55 that morning at Baltimore-Washington Parkway and Route 32, according to online court records. WJLA-TV in Washington reported that he refused to take a field sobriety test.
In 2008, Hill -- then with Kansas State -- apologized and sat out one game after being arrested on suspicion of DUI. "I am embarrassed for the attention this has brought to our program," he said in a statement at the time.
Hill is in his first season at Maryland. He was known at Kansas State for recruiting and for being one of the highest-paid assistant coaches in the nation.
Hill, who is married with three young daughters, took a pay cut to come to Maryland. In September 2010, The Kansas City Star reported that Hill's annual salary with the Wildcats had been increased to $423,750. Hill makes $300,000 at Maryland.
Hill, a former Charlotte guard, is involved in recruiting, scouting opponents and working with Terps guards on basketball technique.
Baltimore Sun reporter Don Markus contributed to this article.