Is there a way to filter the Grandchild records, when a certain Parent record is clicked in an interactive dashboard.
I don’t intend on inserting a Child table view entry in this dashboard view, and I don’t want to have to click a Parent and the child to filter the Grandchild records.
How do you know which child’s grandchildren to display if you do not select a child?
You want all the grandchildren associated with a particular parent displayed?
EDIT:
If the latter, then add a vc in the grandchild to get its grandparent like
[ref to child row].[ref to parent row]
“You want all the grandchildren associated with a particular parent displayed?”
Yes 
add a vc in the grandchild to get its grandparent like
[ref to child row].[ref to parent row]
Thank you