Monica Quan, 28, and her fiancé Keith Lawrence, 27, met while playing basketball at the university nearly six years ago.
The two were found fatally shot inside Lawrence's car in the parking garage of their apartment complex in Irvine on Feb. 3. Quan is the daughter of an LAPD captain who represented Dorner during disciplinary hearings, which resulted in his dismissal from the department.
The killings sparked what the LAPD called the largest manhunt in Southern California history.
Sunday's memorial was held in Concordia's gym. The service was limited to those with an invitation. The school offered a simulcast of the memorial at separate locations on campus to honor their former basketball players.