The third day of the Supercomputing India Conference (SCI) 2025 brought together leading minds from academia, industry and research to explore the next paradigm in computing technologies. With strong participation throughout the day, discussions centred on the need for global collaboration to redefine the future of high-performance computing, artificial intelligence and quantum systems. Day three opened with a plenary session on “Memory Sharing in Heterogeneous Systems” by Dr Peter Hofstee of IBM, followed by a keynote on “Supercomputing Without Borders: HPC, AI Factories, and a Global Digital Partnership for the Exascale Era” delivered by Dr Rossen Apostolov of NAISS Sweden. An additional keynote by Subramani Kengeri of Applied Materials examined system technology co-optimisation for AI-led solutions. The programme featured a broad range of workshops and tutorials covering HPC workload orchestration, autonomous mobility, generative AI data centre architecture, high-performance molecular dynamics, hardware–software co-design for AI and ML accelerators, IPMI-based remote system management, and hands-on learning across HPC, AI and quantum computing. Key highlights included a quantum engineering keynote by Vishal Chatrath of QuantrolOx, a Women in Technology track led by Professor Bineesha Payattati, and a full-day workshop on RISC-V open-source computing. Poster presentations ran throughout the day, providing a platform for emerging researchers to showcase their work. The Tech Expo recorded a footfall of more than 5,000 visitors from industry, academia and government, with exhibitors engaging in in-depth discussions around cutting-edge technologies and solutions. A central attraction was the quantum computing thematic session, “Global Quantum Synergy – Building Bridges from India to the World”, chaired by Colonel A. K. Nath, Senior Advisor for Quantum and HPC Technologies at C-DAC. Presentations included neutral atom quantum computing by Dr Roberto Mauro of Pasqal and modular architectures bridging HPC, AI and quantum systems by Dr Simon Pickartz of ParTec AG. The session highlighted India’s accelerating quantum momentum under national missions, with experts projecting quantum advantage between 2028 and 2030 and emphasising hybrid HPC–quantum architectures and global collaboration. Parallel sessions examined developments in earth sciences, AI infrastructure security, cloud-based data engineering, embedded Linux and next-generation cybersecurity frameworks. A dedicated session on quantum computing and virtual reality explored how quantum principles could influence immersive simulations and training environments. The day concluded with industry-focused interactions, including a Birds of a Feather session by AMD, expert discussions on exascale storage and cybersecurity for HPC, and the Scale X panel, which brought together global technology leaders to encourage collaboration and knowledge exchange.