The 20-year-old Rutter could be confirmed as a new Leeds January signing shortly, according to the report.
A separate Sky report claims that Leeds will pay around 30-40 million Euros for the young French striker, whose market price is at only 16 million Euros.
Plettenberg said Hoffenheim would have loved to hang onto Rutter for longer, but could not resist selling the youngster that only cost them 750 thousand Euros two-years-ago.
So far this season, Rutter has played 17 times for Hoffenheim scoring twice along with three assists. He has an overall record of 11 goals in 64 appearances for the Bundesliga side.
Hoffenheim have already signed a replacement for Rutter in Danish attacker Kasper Dolberg on loan from Ligue 1 side Nice.