Diane Marie Costello

Diane Marie Costello, née Calder, passed away on July 27, 2026. She is lovingly remembered by her children, Jeffrey and Kimberly Costello, and their spouses, Erin and Chap. She is also survived by her sisters, Carolyn Iafrate and Debbie Morrison, and their husbands, Piero and Al, as well as her brother-in-law, Mark Swartz. Diane was predeceased by her parents, Roy and Corrine Calder, and her sister, Sharon Swartz. As a dedicated registered nurse for 44 years, Diane cared for others at The General Hospital and Niagara Health in St. Catharines. A Celebration of Diane's Life will be held at Pleasantview Funeral Home on August 6th from 1:00 p.m. to 3:30 p.m.