Garrus is a close ally throughout Mass Effect but we learn little about his family, outside from his father. Turns out Garrus is very close to his family and you can learn about their fates in Mass Effect 3. In Mass Effect 2 after defeating the Shadow Broker we learn Mordin helped save Garrus mother. Garrus was put into contact with Salarian researchers who are performing an experimental treatment for what’s killing his mother. Mordin helped Garrus by sending experimental Collector tech in exchange for his mother getting into the program. Along with learning Garrus has a sister. During Mass Effect 3 we learn that his father and mother were on Palaven during the Reaper attacks. You can learn what happens by watching the video above as Garrus tries to save them.