On behalf of the Organizing & Programme Committees, we are pleased to invite you to the 3rd International Conference on Plasma Theory and Simulations (PTS-2023), which will be held in Jawaharlal Nehru University, New Delhi, India during September 21-23, 2023. This conference is the third one in the series of PTS, which will cover a broad range of cutting-edge research in plasma theory and simulations.