This book constitutes the refereed proceedings of the Third International Workshop on
Engineering Multi-Agent Systems EMAS 2015 held in Istanbul Turkey in May 2015. The 10 full
papers presented with two invited talks were carefully reviewed and selected from 19
submissions. The focus of the papers is on the topics such as: programming frameworks
languages models and abstractions for MAS formal methods and declarative technologies for
specification verification and engineering of MAS MAS software engineering methodologies and
techniques and development concerns interoperability and integration tools and testbeds MAS
techniques and empirical studies and (industrial) experience reports.