This volume contains the papers that were accepted for presentation at AADEBUG'97, the Third International Workshop on Automated Debugging, held in Linköping, Sweden, May 26­27, 1997.
    The area referred to as automated debugging has seen major developments over the last decade. The goal of the workshop was to bring together researchers from different areas of automated debugging and different programming communities to exchange ideas and advance the state of the art of automated debugging. A total of 20 papers were submitted to the workshop. Of these 11 were accepted for presentation, and 3 as position papers.
    The workshop addresses advances in run-time checking, debugging optimized code, program slicing, software testing, knowledge-based debugging, and diagnosis of constraint programs.
    On behalf of the Program Committee, I would like to thank all those who submitted papers to AADEBUG'97. Thanks also go to the Program Committee and others who helped in reviewing and evaluating the papers. Also, special thanks to the invited keynote speakers, Vijay K. Garg and Massimo Fabris. Last but not the least, the effort of all those who helped in organizing the workshop in one way or another, in particular Nahid Shahmehri, Henrik Nilsson, and David Byers, are gratefully acknowledged.