Juliette Caillouette was born on November 7, 1930 in Meacham, Saskatchewan, the daughter of Ernest Caillouette of St. Arsene, QC and Olga Loiselle of Saskatchewan. She entered the congregation and and received her habit August 25, 1948, receiving her religious name of Sister Theresa Marie. She made her final vows on August 25, 1953.
Sister Theresa Marie obtained her BA Hons from the University of Western Ontario in 1954. In 1960, she earned her MA in Theology from the University of Notre Dame. She also earned her Ontario High School Specialist teaching certificate-permanent in the same year. She achieved her Alberta Permanent Professional teaching certificate in 1962. She completed postgraduate work in guidance at Fordham University in 1966, and in French at the Institut Catholique in Paris in 1967. She also attended training at Lutheran General Hospital with the Loyola Institute of Pastoral Studies in Chicago from 1983-1984, completing one unit of the C.P.E (spiritual care training). Later, she trained at University Hospital in London, ON as a C.P.E. Resident, completing one basic and two advanced units.
Sister Theresa Marie taught at Mount St. Joseph Academy in London, ON from 1954- 1956, and then at a high school in Sarnia, ON from 1956-1960. She then moved to Edmonton, AB where she worked as a high school principal from 1960-1962. Returning to London in 1962, she again taught at Mount St. Joseph Academy until 1964, and then at Catholic Central High School from 1964-1967.
From 1967-1972, she served as vocation director and undertook formation work for the religious community, and from 1969-2007 was involved in spiritual direction and retreat work. Sister Theresa Marie served as a pastoral minister with St. Joseph's Parish in Sarnia from 1972-1979. She then took up a leadership role with the Sisters of St. Joseph in London and served as a General Councillor from 1979-1983. Beginning in 1984, she worked in pastoral care with St. Joseph's Hospital in Sarnia until 1985. She then became Manager of the Pastoral Care Department at the hospital, a role she remained in until 1987.
Returning to London, she was elected the General Superior from 1987-1995. During her time as the congregational leader, Sister Theresa Marie served as a board member with the St. Joseph's Health Centre in London from 1987-1995. During the same period, from 1991-1993, she was elected Vice-President of Federation of the Sisters of St. Joseph in Canada, and then President from 1993-1995. Overlapping with this position, she served as Vice-President of the Canadian Religious Conference from 1993-1995.
During her term as General Superior, missions opened in Fort Good Hope, NWT in 1989, in Faro, YT, Fort Liard, NWT and Deline (Fort Franklin), NWT in 1990, in Igloolik, NU in 1991, and in Lutselk'e, NWT, and Behchoko (Fort Rae), NWT in 1994. A Marriage Tribunal began in Toronto, and the Adult Spirituality Centre on Brock Street, Windsor, opened in 1994. Sister Theresa Marie was the chaplain for Windsor Regional Hospital in Windsor from 1996-2001. She served as a board member for the Hotel Dieu-Grace Hospital in Windsor from 1998-2001. After her retirement in March 2001, she worked in spiritual direction, pastoral counselling, and grief counselling until 2006. She also served as a member of the Canadian Medaille Team in 1967. She died on December 14, 2020.