The 3rd International Conference on Catalysis Science and Chemical Engineering (CatScience) will be held from July 21-23, 2025, at the Budapest University of Technology and Economics. This conference will showcase the latest advances realized in Chemical Engineering, moving with the theme “Advances and Challenges in Applied Catalysis”. It is dedicated to creating a stage for exchanging the latest research results and sharing advanced research methods. CatScience will be a valuable and important platform for inspiring international and interdisciplinary exchange at the forefront of Catalysis. Over the course of 3 days, internationally renowned speakers will describe how their research journey has developed in response to contemporary challenges: inspirational lessons in chemical initiatives and creativity. The attending experts and industry partners will also provide a fantastic networking experience. The Conference will bring together academicians, chemists, scientists, and engineers/technicians from all over the world, and we hope that you will take this opportunity to join us for an academic exchange.