While developing and testing against the Google Contacts v3 API (scope https://www.google.com/m8/feeds/) i created an entry in our company's shared contacts list (i.e. the Directory folder) which doesn't have an id nor is it clickable ("Contact wasn't found"). Therefore i cannot delete that entry. Also it isn't listed when requesting "list contacts" (totalResults: 0).
Google for Work Support couldn't help here and advised to ask in this forum. I hope that someone knows how to get rid of that phantom entry.
As expected the deletion had to be done by Google and was not possible with an additional API call from my side.