The third ISEA International Conference on Security and Privacy (ISEA-ISAP 2020) seeks original submission from researchers presenting novel contributions in the field of Information Security and Privacy. This conference is the third in the series of ISEA conferences. It is sponsored by Information Security and Education Awareness Project – Phase II (ISEA-II), an initiative of Ministry of Electronics and Information Technology, Govt. of India, to promote activities in the field of Information Security and Privacy. This year, the conference is being hosted by IIT Guwahati.