diff --git a/docs/rules/require-param.md b/docs/rules/require-param.md
index 4918198ec..43aa20a8e 100644
--- a/docs/rules/require-param.md
+++ b/docs/rules/require-param.md
@@ -629,6 +629,15 @@ function quux ({ foo, bar: { baz }}) {
 }
 // Message: Missing JSDoc @param "root0" declaration.
 
+/**
+ * @param root0
+ * @param root0.foo
+ * @param root0.bar.baz
+ */
+function quux ({ foo, bar: { baz }}) {
+}
+// Message: Missing JSDoc @param "root0.bar" declaration.
+
 /**
  *
  */
diff --git a/src/rules/requireParam.js b/src/rules/requireParam.js
index 8c02470d1..2855f8ef0 100644
--- a/src/rules/requireParam.js
+++ b/src/rules/requireParam.js
@@ -181,27 +181,36 @@ export default iterateJsdoc(({
    * }}
    */
   const findExpectedIndex = (jsdocTags, indexAtFunctionParams) => {
-    const remainingRoots = functionParameterNames.slice(indexAtFunctionParams || 0);
+    // Get the parameters that come after the current index in the flattened order
+    const remainingFlattenedRoots = flattenedRoots.slice((indexAtFunctionParams || 0) + 1);
+
+    // Find the first existing tag that comes after the current parameter in the flattened order
     const foundIndex = jsdocTags.findIndex(({
       name,
       newAdd,
     }) => {
-      return !newAdd && remainingRoots.some((remainingRoot) => {
-        if (Array.isArray(remainingRoot)) {
-          return (
-            /**
-             * @type {import('../jsdocUtils.js').FlattendRootInfo & {
-             *   annotationParamName?: string|undefined;
-             * }}
-             */ (remainingRoot[1]).names.includes(name)
-          );
+      if (newAdd) {
+        return false;
+      }
+
+      // Check if the tag name matches any of the remaining flattened roots
+      return remainingFlattenedRoots.some((flattenedRoot) => {
+        // The flattened roots don't have the root prefix (e.g., "bar", "bar.baz")
+        // but JSDoc tags do (e.g., "root0", "root0.bar", "root0.bar.baz")
+        // So we need to check if the tag name ends with the flattened root
+
+        // Check if tag name ends with ".<flattenedRoot>"
+        if (name.endsWith(`.${flattenedRoot}`)) {
+          return true;
         }
 
-        if (typeof remainingRoot === 'object') {
-          return name === remainingRoot.name;
+        // Also check if tag name exactly matches the flattenedRoot
+        //   (for single-level params)
+        if (name === flattenedRoot) {
+          return true;
         }
 
-        return name === remainingRoot;
+        return false;
       });
     });
 
diff --git a/test/rules/assertions/requireParam.js b/test/rules/assertions/requireParam.js
index 95b8fdd37..0daf84524 100644
--- a/test/rules/assertions/requireParam.js
+++ b/test/rules/assertions/requireParam.js
@@ -339,6 +339,33 @@ export default /** @type {import('../index.js').TestCases} */ ({
           }
       `,
     },
+    {
+      code: `
+          /**
+           * @param root0
+           * @param root0.foo
+           * @param root0.bar.baz
+           */
+          function quux ({ foo, bar: { baz }}) {
+          }
+      `,
+      errors: [
+        {
+          line: 2,
+          message: 'Missing JSDoc @param "root0.bar" declaration.',
+        },
+      ],
+      output: `
+          /**
+           * @param root0
+           * @param root0.foo
+           * @param root0.bar
+           * @param root0.bar.baz
+           */
+          function quux ({ foo, bar: { baz }}) {
+          }
+      `,
+    },
     {
       code: `
           /**
@@ -2244,8 +2271,8 @@ export default /** @type {import('../index.js').TestCases} */ ({
       /**
        * Description.
        * @param {Object} options
-       * @param options.foo
        * @param {FooBar} foo
+       * @param options.foo
        * @param options.foo.bar
        */
       function quux ({ foo: { bar } }) {}