This book constitutes the thoroughly refereed post-proceedings of the Third International Conference on Formal Modeling and Analysis of Timed Systems, FORMATS 2005, held in Uppsala, Sweden in September 2005 in conjunction with ARTIST2 summer school on Component Modelling, Testing and Verification, and Static analysis of embedded systems.

The 19 revised full papers presented together with the abstracts of 3 invited talks were carefully selected from 43 submissions. The papers cover work on semantics and modeling of timed systems, formalisms for modeling and verification including timed automata, hybrid automata, and timed petri nets, games for verification and synthesis, model-checking, case studies and issues related to implementation, security and performance analysis.