diff --git a/packages/router-core/src/router.ts b/packages/router-core/src/router.ts
index 23e9f99d0c6..caee16c12e3 100644
--- a/packages/router-core/src/router.ts
+++ b/packages/router-core/src/router.ts
@@ -1883,8 +1883,16 @@ export class RouterCore<
           const fn =
             route.options.params?.stringify ?? route.options.stringifyParams
           if (fn) {
-            changedParams = true
-            Object.assign(nextParams, fn(nextParams))
+            try {
+              Object.assign(nextParams, fn(nextParams))
+              changedParams = true
+            } catch {
+              // Ignore errors here. When a paired parseParams is defined,
+              // extractStrictParams will re-throw during route matching,
+              // storing the error on the match and allowing the route's
+              // errorComponent to render. If no parseParams is defined,
+              // the stringify error is silently dropped.
+            }
           }
         }
       }