This volume CCIS 2867 constitutes the proceedings of the Third International Workshop on Secure and Resilient Digital Transformation of Healthcare, SUNRISE 2025, held in Halden, Norway, during November 24-26, 2025. The 5 full papers and 2 invited papers presented in this volume were carefully reviewed and selected from 8 submissions. They were categorized into the following topics: Cybersecurity for IoT-based Healthcare; Cognitive Digital Twins for Resilient Systems; and Invited Papers from Keynotes.