Sacramento State led 34-30 at halftime but the margin was never more than five in the second half.
Carson Shanks had 14 points for UND (5-9, 1-2) in just his fourth game after transferring from Utah State. Jaron Nash, who had nine rebounds, and Terrel de Rouen, who missed a desperation heave at the buzzer, both had 11 points.
Nash had a dunk with 1:36 left to put UND up 61-59 but Cody Demps counted for Sacramento State at 1:08. Nash missed a driving runner with 33 seconds remaining.