With the deal being accomplished by 10 June, Bellingham can play for Dortmund on the Membership World Cup, which begins on Sunday.
Dortmund’s opening group sport is in opposition to Brazilian facet Fluminense on 17 June at 17:00 BST.
Bellingham has been named within the England squad for the European Beneath-21 Championship, to be held in Slovakia from 11-28 June.
However head coach Lee Carsley has mentioned he’ll launch gamers to allow them to compete on the Membership World Cup in the USA.
Bellingham is following within the footsteps of older brother Jude by shifting to the Bundesliga, because the England midfielder – who additionally got here via the Birmingham Metropolis youth system – spent three years with Dortmund earlier than becoming a member of Actual Madrid in 2023.
He added in his farewell to Sunderland followers: “I hope that I’ve made you proud alongside the way in which, and in return, you’ve gotten made me the participant that has reached the heights I discover myself at at this time.
“I’ll love and keep in mind you fondly for the remainder of my life.”
Dortmund, who’ve gained eight German league titles, secured Champions League qualification by ending fourth within the Bundesliga final season.
