Katherine A. (Yntas) Malcolm born in Lexington, MA on November 24, 1940, formerly of Carlisle, Concord, Boulder CO, and Tucson AZ died November 5, 2021 at her home in Sun City West, AZ after long illnesses. She is preceded in death by her parents Joseph & Martha Yntas and her brothers Paul, Joseph, and sister Martha. She married Paul F. (Fred) Malcolm in Concord MA on May 6, 1961. Together they have three children, Timothy Malcolm of Mesa, AZ: Margaret L. (Peggy) Proffitt of Tucson AZ and James F. Malcolm Austin, TX. She is survived by her husband, children and eight grandchildren, Tyler and Evan Malcolm; Sean, Owen, and Samuel Malcolm; Zachary, Hannah, Jordan Proffitt and nephews John and Jim Provost of New Hampshire and niece Mary Ann Tolleston of Stoneham, MA Kathy was a graduate of Lexington High School and the Gemological Institute of America (GIA) as a gemologist and associate of the National Association of Jewelry Appraisers (NAJA) for many years before her retirement. She was a member of Our Lady of Lourdes Parish and Divine Mercy Devotion Group in Sun City West. She loved dancing, painting, sewing and many activities with her children, husband and family. Relatives and friends will gather for a period of visitation on Friday, November 19th from 10 to 11 am in the Dee Funeral Home, 27 Bedford Street, Concord Center, followed by burial at St. Bernard's Cemetery in Concord. Arrangements are under the care of Dee Funeral Home & Cremation Service of Concord, MA.