This document provides information on the participation and engagement of observer organizations and non-Party stakeholders in the UNFCCC intergovernmental process in 2018–2019. Information on the planning and arrangements for the twenty-sixth session of the Conference of the Parties, the sixteenth session of the Conference of the Parties serving as the meeting of the Parties to the Kyoto Protocol and the third session of the Conference of the Parties serving as the meeting of the Parties to the Paris Agreement, other future sessions of the governing bodies and other issues related to the intergovernmental process will be provided in the addendum to this document. Information on the review of the process of admission of observer organizations to the UNFCCC process will be presented in a separate document.