[1] Apart from Italy, all remaining 54 UEFA member national teams entered the qualifying competition,[2] with Gibraltar and Kosovo making their debuts.

The following criteria are applied (Regulations Article 14.02):[3] In the play-offs, the team that scores more goals on aggregate over the two legs qualifies for the final tournament.

If no goals are scored during extra time, the tie is decided by penalty shoot-out (Regulations Article 19.01).

[2] The draw for the qualifying group stage was held on 26 January 2017, 09:00 CET (UTC+1), at the UEFA headquarters in Nyon, Switzerland.

The draw for the play-offs was held on 19 October 2018, 13:00 CEST, at the UEFA headquarters in Nyon, Switzerland.