All four Maryland goals resulted from penalty corners.
The Terps tallied 13 shots but were shutout Sunday.
Despite outshooting the Wolverines 13-6, the Terps couldn't find a goal.
The Terps had been tough to break down, conceding few chances in matchups against the Big Ten's best teams.
Anthe Nijziel's third-quarter goal started the scoring for the Hawkeyes.
Maura Verleg buried the winner in the 3rd quarter.
Riley Donnelly and Taylor Mason are among the Terps' biggest penalty corner threats.
Freshmen Maura Verleg and Anna Castaldo scored their first career goals Friday evening.
Barraco made seven saves for the Nittany Lions as the Terps dropped their second straight game.