The complexity of mobile, ad hoc, and wireless networks requires thoroughly founded models capturing their essential characteristics and new optimization techniques building upon such models. Insights into both the theoretical aspects of these problems as well as practical methods and tools are necessary. This symposium, building upon the two successful WiOpt workshops, intends to bring together researchers and practitioners working on optimization issues from different perspectives, including performance analysis, mobile networking, wireless communication, and optimization theory. Contributions to this conference should show new modeling and optimization techniques suitable for mobile/wireless networks or innovative applications of these techniques to improve network operation. Topics of interest include, but are not limited to: • Modeling techniques and tools for mobile/wireless networks • Performance characterisation & optimisation of mobile/wireless networks and systems • Mobile network optimisation: Applications, algorithms, and tools • Protocol design for optimal mobile network utilisation • Models and optimization approaches for energy efficiency, QoS, bandwidth economy and other aspects of mobile/wireless networks • Models and optimization techniques for non-standard network paradigms like sensor, vehicular, body area networks • Security and co-operation models for mobile networks • Pricing and incentives in mobile and ad-hoc networks