When the Kunming-Montreal Global Biodiversity Framework was adopted by the Conference of the Parties (COP) to the Convention on Biological Diversity (CBD) in December 2022 through decision 15/4 it was made clear that other biodiversity-related conventions and other relevant multilateral agreements had a role to play in its implementation. For this reason, CBD COP decision 15/13 is part of the package of decisions associated with the framework. Amongst other things, this decision calls on the United Nations Environment Programme (UNEP) “to build on the Bern Process and continue to strengthen cooperation and collaboration among biodiversity-related conventions, contributing to effective and efficient implementation of the Kunming-Montreal Global Biodiversity Framework by facilitating a process for cooperation among Parties to the relevant biodiversity-related conventions”. Resolutions of two other MEA governing body meetings make the same call. In order to address this mandate UNEP is planning for a Bern III Conference to take place early in 2024. The Bogis-Bossey Expert Meeting was convened by UNEP at the invitation of the Government of Switzerland with the specific purpose of providing advice to UNEP on the aim and objectives, scope, agenda, participation and modalities of organization of the proposed Bern III Conference, as well as on expected inputs and outputs. It also provided advice on the potential for increasing engagement through online and other mechanisms. A limited number of experts were invited from Parties to the various conventions, from secretariats, and from other organizations and stakeholders. Further detail is included in the following report.