As a result of the success of the previous editions launched in 2016 and 2018. Parallelism in Architecture, Engineering & Computing Techniques – Third Edition will be held in September 2020 in association with the University of East London (UEL) in London, United Kingdom. Parallelism as a way to understand and show the mechanism behind the interaction between architecture, environment and computing techniques. This conference unveils the new trends of architectural technologies and computational thinking that can adapt and improve finding a complex digital fabrication, augmented reality, and the intelligent environment in addition to several related topics. It depends on the cooperation between humans and technology. The conference represents an important forum for computational and digital architecture research that reconciles parallelism in different architectural and computing. The conference also includes within its scope several workshops and technical sessions. The research, that is the master part of the debate, is to be contributed with and discussed over several sessions that are introduced and initiated with keynote lectures. The lectures are to be given by well-known speakers and continued by the exchange of knowledge and ideas between the researchers themselves.