During her tenure at the University of Chicago Law School, Garrett started dating Israeli legal philosopher, Andrei Marmor, and they got married soon after. Matthew Spitzer, dean of USC Gould School of Law at the time, coincidentally attempted to recruit both Garrett and Marmor independently to come to USC before they met. Soon after they decided to get married, Garrett and Marmor accepted USC's offers. She and her husband enjoyed traveling together, and most recently visited Cambodia, Vietnam, and Italy before her death in 2016.