In　this　paper,　we　are　concerned　with　the　long-time　behavior　of　solution　to　the　barotropic　compressible　Naiver-Stokes　system　in　three　dimensions　with　physically　realistic　outflow　condition.　It　is　shown　that　the　superposition　of　a　planar　boundary　layer　(both　subsonic　case　and　transonic　case)　and　a　planar　rarefaction　wave　is　time　asymptotically　stable　under　small　initial　perturbation,　provided　that　the　magnitude　of　the　stationary　solution　is　sufficiently　small,　while　the　wave　strength　of　rarefaction　wave　may　be　large.　This　is　the　first　result　on　the　stability　of　composite　wave　patterns　for　the　barotropic　compressible　Navier-Stokes　system　in　high　dimensions　with　outflow　boundary　condition.　Our　approach　is　based　on　the　nonlinear　energy　methods.　(C)　2022　Elsevier　Inc.　All　rights　reserved.