These Proceedings contain research presented at the 3rd World Summit on Exploring the Dark Side of the Universe (EDSU2020), one of the major venues of interaction between cosmologists and particle physicists. Topics include Cosmological Microwave Background, Large Scale Structure, Inflation and Early Universe, Particle Astrophysics, Dark Matter and Dark Energy, and Particle Physics.
The 3rd World Summit on Exploring the Dark Side of the Universe (EDSU2020) (https://indico.cern.ch/event/801461/overview) took place from March 9 to 13 in the Guadeloupe Islands, a picturesque French archipelago in the Caribbean. This was the 3rd meeting in this series of workshops, with previous editions held in the Galapagos Islands and Guadeloupe. The workshop was attended by 89 participants from 27 countries, including a large number of students. During the entire workshop, more than 60 talks were presented and many discussion sessions were held.