The W3C SCXML standard for Harel state-charts, in unison with the W3C MMI architecture specification and related work from the W3C MMI working group are a promising suite of recommendations for interoperable Internet-of-Things applications and appliances. Either in its role as a dialog manager for multi-modal user interfaces or as a general description for reactive systems, SCXML fills an important void in the landscape of available W3C recommendation. This 3rd installment of the workshop will provide a forum for academia and industry alike to present and discuss recent developments with regard to SCXML and to identify extensions and adaptations as part of a continued standardization effort.