This book constitutes the refereed post-proceedings of the Third European Workshop on Software Architecture, EWSA 2006, held in France in September 2006. The 13 revised full research papers and five revised position papers presented together with one invited talk were carefully reviewed and selected. All current aspects of software architectures are addressed ranging from foundational and methodological issues to application issues of practical relevance.

Invited Talk.- Primacy of Place: The Reorientation of Software Engineering Demanded by Software Architecture.- Research Papers.- Fault Tolerant Web Service Orchestration by Means of Diagnosis.- Synthesis of Concurrent and Distributed Adaptors for Component-Based Systems.- Introspective Model-Driven Development.- Eliminating Execution Overhead of Disabled Optional Features in Connectors.- Automated Selection of Software Components Based on Cost/Reliability Tradeoff.- On the Modular Representation of Architectural Aspects.- Configurations by UML.- Modes for Software Architectures.- Integrating Software Architecture into a MDA Framework.- Layered Patterns in Modelling and Transformation of Service-Based Software Architectures.- Towards MDD Transformations from AO Requirements into AO Architecture.- Modeling and Analyzing Mobile Software Architectures.- Preserving Software Quality Characteristics from Requirements Analysis to Architectural Design.- Position Papers.- Identifying "Interesting" Component Assemblies for NFRs Using Imperfect Information.- Towards More Flexible Architecture Description Languages for Industrial Applications.- Architecture Transformation and Refinement for Model-Driven Adaptability Management: Application to QoS Provisioning in Group Communication.- Automating the Building of Software Component Architectures.- Component Deployment Evolution Driven by Architecture Patterns and Resource Requirements.