This book constitutes the thoroughly refereed post-conference proceedings of the Third International Haifa Verification Conference, HVC 2007, held in Haifa, Israel, in October 2007. The 15 revised full papers presented together with 4 invited lectures were carefully reviewed and selected from 32 submissions. The papers are organized in topical tracks on hardware verification, model checking, dynamic hardware verification, merging formal and testing, formal verification for software and software testing