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Rockfalls are one of the geological-based natural disasters and it develops in the control of factors such as lithology, discontinuities, slope, decomposition, roughness and vegetation. There are generally 2 and 3 dimensional solutions for the modeling of rock falls in engineering projects. However, 3D solutions have been used frequently in recent years because they simulate the natural environment more precisely. With the widespread use of unmanned aerial vehicles, very valuable data can be collected about the location and block size of discontinuities on steep slopes, which are very difficult to access as well as topography and vegetation creating a point cloud with orthophotos. In this study, potential rock drops in Kasımlar Village of Sütçüler District in Isparta Province were modeled as 3D in Geographic Information Systems with photogrammetric methods using Unmanned Aerial Vehicle. At the same time, the trajectories of falling blocks belongs to possible rockfalls, trajectory, passing heights and energies are calculated and areas under risk are mapped. According to the results of 3D modeling for four blocks ranging in size from 26 m3 to 355 m3, the maximum kinetic energy is 55170kJ, the maximum passing heightis 11.5 m and the maximum simulated velocity are 24.7m/s.. [ABSTRACT FROM AUTHOR]