How long does a parent have to be out of their child's life before it can be considered abandonment. My niece has been living here with us for over 2 weeks when her mother said she was going to pick her up afte ronly 1 night with us. She won't answer our calls and turns off her phone whenever we do call. When can it be considered abandonment?

Abandonment is not the issue.Please read this sticky: https://www.askmehelpdesk.com/family-law/child-abandonment-read-first-364259.html

So the question is what do you want to do?