Generation of electromagnetic waves, their propagation in inhomogeneous active plasma, amplification and absorption by - and interactions with - charged particle populations, generally covered by the term “wave-particle interactions”, are key processes responsible for energy and momentum exchange between charged particles in absence of collisions. New generation of spacecraft missions, PSP, Solar Orbiter, MAVEN, Juno, MMS, ERG/Arase, provide unique and detailed information about wave-particle interactions and their impact on microscopic plasma kinetics as well as contribution to dynamics of macroscopic plasma systems. Observations of these missions of similarity and differences of wave-particle interactions in solar wind, radiation belts, and magnetospheres of different planets drive rapid growth of new theoretical concepts, including effects of nonlinear and nonresonant interactions into more conventional quasi-linear models. This session aims to connect specialists focused on spacecraft observations of different aspects of wave-particle interactions in various space plasma systems and specialists working on the next generation of theoretical models incorporating nonlinear and nonresonant interaction effects.