ProteoAix 2022-3 will be the 3rd Joint Meeting of Spanish, French, and Portuguese Proteomics Societies. The meeting was assembled to provide participants with a broad view of the diverse perspectives and applications of proteomics and its related fields, and emphasising new developments and scientific advances. The meeting programme is organised into main sessions that integrate technical and methodological aspects, their various applications, complementarity with other areas and methodologies, together with up-to-date and state-of-the-art research. The invited speakers were carefully chosen to share and discuss a wide range of topics from the most fundamental aspects to new subjects. Conditions were put in place to allow and promote science sharing by all participants. Plenary lectures, small talks, flash talks, poster sessions, and relaxed social events are programmed so that everyone can interact, discuss, and promote their projects in a great ambience.