This book constitutes the thoroughly refereed conferenceproceedings of the Third International Workshop on Risk Assessment andRisk-driven Testing, RISK 2015, held in conjunction with the OMG TechnicalMeeting in Berlin, Germany, in June 2015.

The revised 8 full papers were carefully reviewed and selectedfrom 12 submissions. This workshop addresses systematic approaches that combinerisk assessment and testing. Also, the workshop was structured into the threesessions namely Risk Assessment, Risk and Development and Security Testing.