The 2003 ABC Championship qualification was held in late 2002 and early 2003 with the Gulf region, West Asia, Southeast Asia, East Asia and Middle Asia (Central Asia and South Asia) each conducting tournaments.
The following are eligible to participate:
<nowiki>*</nowiki> Withdrew, and were given a wild card entry into the championship.
All the others withdrew, so and qualified automatically.
The 2002 Gulf Basketball Association Championship is the qualifying tournament for the 2003 ABC Championship. the two best teams excluding Qatar qualifies for 2003 ABC Championship. The tournament was held at Dubai, United Arab Emirates.
The 2003 Middle Asia Basketball Championship is the qualifying tournament for the 2003 ABC Championship. the two best teams qualifies for 2003 ABC Championship. The tournament was held at New Delhi, India.
The 5th Southeast Asia Basketball Association Championship is the qualifying tournament for the 2003 ABC Championship. the two best teams qualifies for 2003 ABC Championship. The tournament was held at Kuala Lumpur, Malaysia.
The 2002/2003 West Asia Basketball Association Championship is the qualifying tournament for the 2003 ABC Championship. the two best teams qualifies for 2003 ABC Championship. The tournament supposed to be held in 3 stages in Jordan, Iran and Iraq in late 2002 and early 2003 but the last round was cancelled.