diff --git a/packages/remix/package.json b/packages/remix/package.json
index 2b8365f1f43f..5399dcbd29c3 100644
--- a/packages/remix/package.json
+++ b/packages/remix/package.json
@@ -51,6 +51,23 @@
       "import": {
         "default": "./build/import-hook.mjs"
       }
+    },
+    "./v3": {
+      "import": {
+        "types": "./build/types/v3/index.server.d.ts",
+        "default": "./build/esm/v3/index.server.js"
+      }
+    },
+    "./v3/client": {
+      "import": {
+        "types": "./build/types/v3/index.client.d.ts",
+        "default": "./build/esm/v3/index.client.js"
+      }
+    },
+    "./v3/node": {
+      "import": {
+        "default": "./build/v3-node.mjs"
+      }
     }
   },
   "publishConfig": {
@@ -58,6 +75,7 @@
   },
   "dependencies": {
     "@remix-run/router": "^1.23.4",
+    "@sentry/browser": "11.0.0",
     "@sentry/bundler-plugins": "11.0.0",
     "@sentry/conventions": "^0.24.0",
     "@sentry/core": "11.0.0",
@@ -81,7 +99,8 @@
     "@remix-run/node": "2.x",
     "@remix-run/react": "2.x",
     "@remix-run/server-runtime": "2.x",
-    "react": "18.x"
+    "react": "18.x",
+    "remix": ">=3.0.0-rc.1 <4"
   },
   "scripts": {
     "build": "run-p build:transpile build:types",
@@ -115,9 +134,27 @@
           "{projectRoot}/build/cjs",
           "{projectRoot}/build/npm/esm",
           "{projectRoot}/build/npm/cjs",
-          "{projectRoot}/build/import-hook.mjs"
+          "{projectRoot}/build/import-hook.mjs",
+          "{projectRoot}/build/v3-node.mjs"
         ]
       }
     }
+  },
+  "peerDependenciesMeta": {
+    "@remix-run/node": {
+      "optional": true
+    },
+    "@remix-run/react": {
+      "optional": true
+    },
+    "@remix-run/server-runtime": {
+      "optional": true
+    },
+    "react": {
+      "optional": true
+    },
+    "remix": {
+      "optional": true
+    }
   }
 }
diff --git a/packages/remix/rollup.npm.config.mjs b/packages/remix/rollup.npm.config.mjs
index 9bf3f04f3ee3..d6992abc3302 100644
--- a/packages/remix/rollup.npm.config.mjs
+++ b/packages/remix/rollup.npm.config.mjs
@@ -1,10 +1,19 @@
+import { defineConfig } from 'rollup';
 import { makeBaseNPMConfig, makeNPMConfigVariants, makeOrchestrionLoader } from '@sentry-internal/rollup-utils';
 
+// `external: /.*/` keeps the `remix` import a runtime resolution against the installed package.
+const v3NodeEntry = defineConfig({
+  input: 'src/v3/node.mjs',
+  external: /.*/,
+  output: { format: 'esm', file: 'build/v3-node.mjs' },
+});
+
 // We rely on esbuild's defaults for JSX (`jsx: 'transform'` = classic runtime, no
 // __self/__source attributes). React 19 prefers the new automatic transform, but switching
 // to it would break React 17 support — so we intentionally stay on classic for now.
 // https://legacy.reactjs.org/blog/2020/09/22/introducing-the-new-jsx-transform.html
 export default [
+  v3NodeEntry,
   ...makeNPMConfigVariants(
     makeBaseNPMConfig({
       entrypoints: [
@@ -14,12 +23,17 @@ export default [
         'src/server/index.ts',
         'src/cloudflare/index.ts',
         'src/vite/index.ts',
+        'src/v3/index.server.ts',
+        'src/v3/index.client.ts',
       ],
       packageSpecificConfig: {
         external: ['react-router', 'react-router-dom', 'react', 'react/jsx-runtime'],
         output: {
           // make it so Rollup calms down about the fact that we're combining default and named exports
           exports: 'named',
+          // Without this, Rollup infers a common root from the whole module graph, which here reaches
+          // into sibling workspace packages, and the v3 entries land outside `build/esm/v3/`.
+          preserveModulesRoot: 'src',
         },
       },
     }),
diff --git a/packages/remix/src/v3/index.client.ts b/packages/remix/src/v3/index.client.ts
new file mode 100644
index 000000000000..7cdc7036be5a
--- /dev/null
+++ b/packages/remix/src/v3/index.client.ts
@@ -0,0 +1,8 @@
+// A named list rather than `export * from '@sentry/browser'`: Remix 3 has no bundler, so a wildcard
+// makes every export reachable and nothing can be tree shaken out of the served module graph.
+//
+// `init` is withheld until the Remix 3 browser SDK lands. Re-exporting `@sentry/browser`'s would give
+// an app History based tracing, which yields no navigation spans in Remix 3, so it would look
+// configured while reporting nothing.
+export { captureException, captureMessage } from '@sentry/browser';
+export type { BrowserOptions } from '@sentry/browser';
diff --git a/packages/remix/src/v3/index.server.ts b/packages/remix/src/v3/index.server.ts
new file mode 100644
index 000000000000..107a51657aca
--- /dev/null
+++ b/packages/remix/src/v3/index.server.ts
@@ -0,0 +1,4 @@
+// Placeholder until the Remix 3 server instrumentation lands. `@sentry/node`'s `init` already emits
+// `http.server` spans, so this is useful on its own; route parameterisation and router error capture
+// are what is still missing.
+export * from '@sentry/node';
diff --git a/packages/remix/src/v3/node.mjs b/packages/remix/src/v3/node.mjs
new file mode 100644
index 000000000000..4923bc078d97
--- /dev/null
+++ b/packages/remix/src/v3/node.mjs
@@ -0,0 +1,3 @@
+// Replaces `--import remix/node-tsx` rather than adding a second flag. Sentry's module hook is
+// registered here once the server instrumentation lands, so for now nothing is instrumented.
+await import('remix/node-tsx');
diff --git a/packages/remix/test/v3-exports.test.ts b/packages/remix/test/v3-exports.test.ts
new file mode 100644
index 000000000000..96e2c033ae76
--- /dev/null
+++ b/packages/remix/test/v3-exports.test.ts
@@ -0,0 +1,66 @@
+import * as fs from 'node:fs';
+import * as path from 'node:path';
+import * as semver from 'semver';
+import { describe, expect, it } from 'vitest';
+
+import packageJson from '../package.json';
+
+const packageRoot = path.resolve(__dirname, '..');
+
+// `exports` mixes shapes (`"./package.json"` is a bare string), so it does not fit one index signature.
+const exportsMap = packageJson.exports as unknown as Record<string, { import?: Record<string, string> }>;
+
+/**
+ * A mismatch between the `exports` map and the build output is invisible: the build and lint both
+ * pass, and the package is broken only for whoever installs it. Rollup infers its output layout from
+ * the module graph, so an unrelated change can relocate these files.
+ */
+describe('Remix 3 exports', () => {
+  const subpaths = ['./v3', './v3/client', './v3/node'];
+
+  it.each(subpaths)('%s is declared in the exports map', subpath => {
+    expect(packageJson.exports).toHaveProperty([subpath]);
+  });
+
+  it.each(subpaths)('%s only exposes an import condition', subpath => {
+    // Remix 3's asset server rejects CommonJS outright, so a `require` condition could never load.
+    expect(Object.keys(exportsMap[subpath] ?? {})).toEqual(['import']);
+  });
+
+  it.each(subpaths)('%s points at files that exist in the build output', subpath => {
+    const targets = Object.values(exportsMap[subpath]?.import ?? {});
+
+    expect(targets.length).toBeGreaterThan(0);
+
+    for (const target of targets) {
+      expect(fs.existsSync(path.join(packageRoot, target)), `${subpath} -> ${target} is missing`).toBe(true);
+    }
+  });
+
+  describe('the Remix 3 peer range', () => {
+    const range = packageJson.peerDependencies.remix;
+
+    // Asserted by behaviour, so the range can change after Remix 3 reaches GA without failing here.
+    it('accepts release candidates', () => {
+      // `3.x` does not match `3.0.0-rc.1`: semver ranges exclude prereleases unless they name one.
+      expect(semver.satisfies('3.0.0-rc.1', range)).toBe(true);
+      expect(semver.satisfies('3.0.0-rc.2', range)).toBe(true);
+    });
+
+    it('accepts stable 3.x', () => {
+      expect(semver.satisfies('3.0.0', range)).toBe(true);
+      expect(semver.satisfies('3.4.2', range)).toBe(true);
+    });
+
+    it('rejects the next major', () => {
+      expect(semver.satisfies('4.0.0', range)).toBe(false);
+    });
+  });
+
+  it('marks every peer dependency optional', () => {
+    // A Remix 3 app must not have the Remix 2 packages or React installed on its behalf.
+    for (const name of Object.keys(packageJson.peerDependencies)) {
+      expect(packageJson.peerDependenciesMeta, `${name} should be optional`).toHaveProperty([name, 'optional'], true);
+    }
+  });
+});