This book constitutes the refereed proceedings of the Third International Conference on Subject-Oriented Business Process Management, S-BPM ONE 2011, held in Ingolstadt, Germany, in September 2011. The papers feature the analysis, modeling, implementation, execution and management of interaction patterns with an explicit stakeholder focus and also embrace themes pertaining to the engineering and management of systems and organizations, particularly with respect to the areas of interaction culture, process-aware information systems, strategic alignment, and governance structures.