Posted in Organizations, Schools & Education CAS3 stands for Combined Arms and Services Staff School CAS3 stands for Casualty Actuarial Society Third Exam CAS3 Share Pinterest Tweet Whatsapp Post navigation CAS-CICAS/PWI Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.