This second of three volumes presents papers from the third series of NODYCON to be held in June of 2023. The conference papers reflect a broad coverage of topics in nonlinear dynamics, both traditionally placed in established streams of research as well as they stand as newly explored and emerging venues of research. These include • Multi-scale dynamics: multiple time/space scales, large system dynamics • Experimental dynamics: benchmark experiments, experimental methods, instrumentation techniques, measurements in harsh environments, experimental validation of nonlinear models • Reduced-order modeling: center manifold reduction, nonlinear normal modes, normal forms • Systems with time and/or space delays • Nonlinear interactions in multi-dof systems: parametric vibrations, multiple external and autoparametric resonances. • Computational techniques: efficient algorithms, use ofsymbolic manipulators, integration of symbolic manipulation and numerical methods, use of parallel processors. • Nonlinear system identification: parametric/nonparametric identification, data-driven identification • Multibody dynamics: rigid and flexible multibody system dynamics, impact and contact mechanics, tire modeling, railroad vehicle dynamics, biomechanics applications, computational multibody dynamics • Fluid/structure interaction • Nonlinear wave propagation in discrete and continuous media