In this study, we present a coupled volume of fluid-fictitious domain method for the simulation of droplet-particle binary interactions. In this approach, the liquid-gas flow is modelled by the VOF method, and the particle presence is introduced to the Eulerian grids by a volume fraction scalar field. The hydrodynamic forces acting on the particle are computed over the particlecovered grids, and particle moves according to Newton's second law. A penalization term is added to the momentum equation at the particle-covered grids via a continuous force field. The VOF algorithm is then modified to prevent the penetration of liquid into the particle region. First, a 3D benchmark problem is tested for validation. Then, a 3D configuration is considered for the droplet-particle interaction where a water droplet and a solid particle constitute a headson binary collision in the surrounding air. The collision behaviour at different impact velocities and droplet-to-particle diameter ratios are pictured, and the outcome regimes are characterized based on impact Weber numbers. The present approach is developed within the opensource C++ libraries of OpenFOAM and LIGGGHTS ® codes and can be further employed for the fully-resolved description of the interfacial physics in droplet-laden flows in the presence of moving particles.