Adnan Januzaj play for England under the rules set out in the Home Nations agreement. The Home Nations agreement requires that players engage in a minimum of five years of education before the age of 18 within the territory of the relevant association and do not offer national team eligibility through residency. Despite having played competitively for Belgium at senior level, Januzaj remained eligible to represent Kosovo, as it was not a UEFA or FIFA member when he made his Belgian debut. However, once he made another appearance with Belgium after 2016, the year in which Kosovo became a member of FIFA,
Adnan Januzaj for Dortmund in the first half of the season, starting three times. On 12 August 2016, Januzaj agreed to join Sunderland on a season-long loan move from Manchester United, linking up with former Manchester United manager David Moyes. Januzaj made his debut the following day, coming off the bench against Manchester City in a 2–1 defeat on the opening weekend of the Premier League season. In his third game for Sunderland against Shrewsbury Town, Januzaj scored his first goal for the team, a late winner. Januzaj was sent off for two yellow cards on 18 September in a 1–0 loss