Rank-Based Test to Evaluate a Surrogate Marker R package SurrogateRank version 3.0 Uses a novel rank-based nonparametric approach to evaluate a surrogate marker in a small sample size setting. Details are described in Parast et al (2024) <doi:10.1093/biomtc/ujad035>, in Hughes A et al (2025) <doi:10.1002/sim.70241>, and in Hughes A et al (2026) <doi:10.48550/arXiv.2605.03819>. A tutorial for this package can be found at <https://www.laylaparast.com/surrogaterank> and a Shiny App implementing the package can be found at <https://parastlab.shinyapps.io/SurrogateRankApp/>. Software Depends: R (>= 3.5.0) Imports: stats, dplyr, ggplot2, pbmcapply, cowplot, tidyr, ComplexUpset, ggVennDiagram, tibble, glue, scales, MASS Suggests: roxygen2 Layla Parast <parast@austin.utexas.edu> Comprehensive R Archive Network (CRAN) Layla Parast [aut, cre], Arthur Hughes [aut] GPL 2026-06-18 application/tgz https://CRAN.R-project.org/package=SurrogateRank doi:10.32614/CRAN.package.SurrogateRank