Karen Marie Markstrum Clinton - Karen Marie Markstrum passed away on Dec. 16, 2021 at Hunterdon Developmental Center in Clinton, NJ where she had lived for the past 51 years. Karen was born in Wausau on May 28, 1964, the beloved daughter of William and the late Dolores (Lietz) Markstrum. Karen moved to New Jersey with the family in 1966. She was preceded in death by her grandparents, mother Dolores "Dee" Markstrum, several aunts, uncles and cousins Peter and Terri Markstrum. Karen is survived by her father, Bill Markstrum, sister Theresa "Terry" Delavan, brother Keith (Patricia) Markstrum, niece Shannon (John) Todd, nephews Patrick (Andrea) Delavan, Eric (Molly) Markstrum, Kevin (Katie) Markstrum, great-nephews Sean Dyer, Mitchell Todd, Hudson Markstrum and great-nieces Sydney, Avery and Hadley Delavan, and River and Everly Markstrum. A Mass of Christian Burial will be celebrated by Msgr. Mark Pierce on Friday, January 7th at 2:30 PM at Church of the Resurrection, Wausau, preceded by Visitation in Francis Hall at 2:00 PM until the time of the service. The family would like to thank the staff at Hunterdon Developmental Center, Hunterdon Medical Center, and the Robert Wood Johnson University Hospital in New Jersey for their loving care of Karen through the years. In lieu of flowers, donations may be made in Karen's name to the Association for Hunterdon Developmental Center Inc. c/o Hunterdon Developmental Center, P.O. Box 4003, Clinton, NJ 08809-4003. John J. Buettgen Funeral Home is assisting the family with arrangements. Online condolences may be expressed at HonorOne.com