Photo of Allisa Ann LEISTNER (nee Mantesso)

Allisa Ann LEISTNER (nee Mantesso)

April 28, 2026
Age 44
St. Catharines, Ontario
Considerate Cremation & Burial Services

Allisa Ann Leistner (nee Mantesso) passed away on Tuesday, April 28, 2026, at the age of 44, in the ICU at West Lincoln Memorial Hospital. She is survived by her husband Tom, daughter Hailey, sister Jennifer Mantesso, parents Ron and Denice Mantesso, dog Boston, and many loving aunts, uncles, and cousins. She is also survived by the Leistner Family, including Steve and Bonnie, sister-in-law Stephanie and Sean Corcoran, brother-in-law Andrew and Katie Leistner, nieces Emily, Julia, Samantha, and nephew Nate. Cremation has taken place, and a Celebration of Life will follow at a later date. In lieu of flowers, memorial donations may be made to the Canadian Diabetes Association. Arrangements are entrusted to Considerate Cremation & Burial Services.

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