Saint Mary's (6-6) fell behind early when Idaho (12-1) captured wins at No. 2 and 3 doubles to take the first point of the match.
The Gaels did get one win in doubles, with the No. 1 team of Jesse Kiuru and Norstrom beating Abid Akbar and Marius Cirstea 8-5.
After Idaho won at No. 5 singles to go up 2-0, Norstrom put the Gaels on the board with a win at No. 2. Saint Mary's captain defeated Akbar 7-6, 6-1.
El Sherbini would be the only other Gael to hit the scoreboard, beating Cesar Torres 6-4, 6-3 to claim a point at No. 4.
Saint Mary's also lost two tough three-set matches, including Kiuru dropping a third-set tiebreaker at No. 1. Thomas Hunt also pushed his match at No. 6 to three sets.
The Gaels will be back on the court on Sunday at 11 a.m. when they face No. 40 Oregon.