The qualifying rounds for the 2002–03 UEFA Champions League began on 17 July 2002.
In total, there were three qualifying rounds which provided 16 clubs to join the group stage.
The draw for this round was performed on 21 June 2002 in Geneva, Switzerland.
Belshina Bobruisk Kaunas Shelbourne Vardar Hibernians Barry Town Flora Pyunik Željezničar Portadown
Dinamo Tirana F91 Dudelange Zhenis Vardar won 4–1 on aggregate.
[1] Dynamo Kyiv Sparta Prague Club Brugge Boavista
Brøndby Maccabi Haifa Legia Warsaw Lillestrøm Basel Partizan Zagreb Levski Sofia Maribor Dinamo București Hammarby IF Skonto[†] Žilina Zalaegerszeg
Pyunik[†] Torpedo Kutaisi[†] Sheriff Tiraspol[†] Željezničar[†] Belshina Bobruisk[†] Dinamo Tirana[†] Hibernians[†] Vardar[†] GAK won 6–1 on aggregate.
The draw for this round was performed on 26 July 2002 in Nyon, Switzerland.
[1] Bayern Munich Manchester United Barcelona Internazionale Feyenoord Milan Dynamo Kyiv[†] Lokomotiv Moscow AEK Athens Sparta Prague[†] Rosenborg Newcastle United Club Brugge[†] Sturm Graz Boavista[†] Celtic Sporting CP Auxerre Slovan Liberec
Shakhtar Donetsk Genk Brøndby[†] Fenerbahçe Maccabi Haifa[†] Legia Warsaw[†] Željezničar[†] Basel[†] Partizan[†] Zalaegerszeg[†] Levski Sofia[†]