Software is becoming increasingly aware of its current execution context. Decisions that were traditionally made at design time are being postponed until runtime to improve the services that software provides to its users. In addition, software reasons about the execution environments and its internal state to improve the functionality provided to its users. Some of the keywords that characterize software today are: context-aware, dynamic, autonomous, smart, adaptive, self-managed. In this context, the Context-aware, Autonomous, and Smart Architectures (CASA) workshop aims to address the issues and challenges raised by the design, implementation, and evaluation of software systems characterized by the above keywords. Novel design and development approaches are needed to address the new issues raised by such systems. New solutions are expected to properly address the trade-offs between the various quality attributes that characterize these systems. Or, existing architectural solutions should be adapted and improved to meet the evolving and dynamic requirements of context-aware, autonomous, and intelligent systems. The workshop aims to bring together software engineers, computer scientists, researchers, practitioners, and educators to discuss and exchange results, case studies, experiences, novel approaches, and visionary ideas on software architectures for context-aware, autonomous, and smart solutions.