3D Fuel Segmentation Using Terrestrial Laser Scanning and Deep Learning R package FuelDeep3D version 0.1.1 Provides tools for preprocessing, feature extraction, and segmentation of three-dimensional forest point clouds derived from terrestrial laser scanning. Functions support creating height-above-ground (HAG) metrics, tiling, and sampling point clouds, generating training datasets, applying trained models to new point clouds, and producing per-point fuel classes such as stems, branches, foliage, and surface fuels. These tools support workflows for forest structure analysis, wildfire behavior modeling, and fuel complexity assessment. Deep learning segmentation relies on the PointNeXt architecture described by Qian et al. (2022) <doi:10.48550/arXiv.2206.04670>, while ground classification utilizes the Cloth Simulation Filter algorithm by Zhang et al. (2016) <doi:10.3390/rs8060501>. Software Depends: R (>= 4.1) Imports: stats, RColorBrewer, viridisLite, rlang Suggests: lidR, reticulate, dbscan, ggplot2, rgl, RCSF, scales Venkata Siva Reddy Naga <venkatasivareddy003@gmail.com> Comprehensive R Archive Network (CRAN) Venkata Siva Reddy Naga [aut, cre], Alexander John Gaskins [aut], Carlos Alberto Silva [aut] GPL (>= 3) 2026-03-02 application/tgz https://CRAN.R-project.org/package=FuelDeep3D doi:10.32614/CRAN.package.FuelDeep3D