Marleigh graduated from the J.D. program at Osgoode Hall. Prior to law school, she obtained her Honours B.A. in Psychology and Criminology from Western University, which included an exchange at Bond University in Queensland, Australia.
At Osgoode, Marleigh worked as a research assistant for Dean Lorne Sossin and as a dean’s fellow for Professor Craig Scott. She was also a member of the Mediation Clinic Intensive Program, participated in both the Laskin and Wilson moots, and served as vice-president of the Jewish Law Students’ Association.