Is there a way to hide Parent row if no "children" has been found in a SharePoint joined view?

I have a list and a library joined as a linked data source and placed on a WebPage's webpart. Everything works fine, but I have a number of entries where my first column (Parent) list that doesn't have corresponding entries in a joined view. Is there way to use some kind of if logic and hide them? (I'm using SharePoint Designer 2010 to handle this).

Thank you!