My Father has dissappeared

Today I woke up with my dad saying he won't see me again and took off with my grandparents to go to the mental health center. when My grandparents dropped him off they told me he was walking in that direction, but he didn't go to that building instead he went somewhere west and before he did that he told my grandparents that he wasn't going to see them again or anyone in the family. After hearing that my grandparents gave me his phone number, so tomorrow when it's a new day I'll try to get a hold of him.