This is a partial list of unnumbered minor planets for principal provisional designations assigned between 16 March and 15 April 2003. As of January 2022, a total of 468 bodies remain unnumbered for this period. Objects for this year are listed on the following pages: A–E · F–G · H–L · M–R · Si · Sii · Siii · Siv · T · Ui · Uii · Uiii · Uiv · V · Wi · Wii and X–Y. Also see previous and next year.