Kathleen A. Mallatt, 63, of Plainfield, passed away on November 19, 2018. She was born in Indianapolis to Dr. Thomas Jr. and Rosemarie Quill. Kathleen attended Our Lady Of Grace Academy in Beech Grove. She received her degree from Indiana University in Dental Hygiene. Kathleen worked in the dental office of Thomas E. Quill Jr. and Thomas E. Quill II. She was currently working at St. Susanna Catholic School. Kathleen was a dedicated member and volunteer at St. Susanna Catholic Church. She was a master gardener and an avid pet lover. A Funeral Mass will be held at St. Susanna Catholic Church (1210 E. Main Street, Plainfield, IN, 46168) on Monday, November 26, at 2:00 pm where friends may visit from 12:00 (noon) until time of service. Burial will follow at Calvary Cemetery. Survivors include her parents, Thomas Jr. and Rosemarie Quill; sisters, Marianne (Don) Harris, Suzie (Hassan) Mihankhah and Meg (Chris) Swhear; former husband, Dr. Mark Mallatt; nephew, Sean Harris; nieces, Monica Austin, Jaclyn Swhear Lawson and Julia Harris. Contributions may be sent to St. Susanna Catholic School (1212 E. Main Street, Plainfield, IN, 46168).