Tanner, Alexander and Andrew went missing on Thanksgiving Day three years ago.

Nov. 28 will be Tanya Zuver’s third Thanksgiving without her three sons. The boys were last seen on Thanksgiving Day, 2010 at their father’s house in Morenci, Mich. A neighbor saw them playing in the backyard.

It is believed the children vanished between 2 p.m. Nov. 26 and 11 a.m. the following day when their father, John Skelton, checked himself into a medical facility.