diff --git a/CHANGES b/CHANGES
index ef8b0de04..a0aaf5075 100644
--- a/CHANGES
+++ b/CHANGES
@@ -32,6 +32,9 @@ Deprecated
 * ``sphinx.directives.TocTree``
 * ``sphinx.directives.VersionChange``
 * ``sphinx.domains.std.StandardDomain._resolve_citation_xref()``
+* ``sphinx.domains.std.StandardDomain.note_citations()``
+* ``sphinx.domains.std.StandardDomain.note_citation_refs()``
+* ``sphinx.domains.std.StandardDomain.note_labels()``
 * ``sphinx.environment.NoUri``
 * ``sphinx.ext.autodoc.importer.MockFinder``
 * ``sphinx.ext.autodoc.importer.MockLoader``
diff --git a/doc/extdev/deprecated.rst b/doc/extdev/deprecated.rst
index 221d7e735..beeafab08 100644
--- a/doc/extdev/deprecated.rst
+++ b/doc/extdev/deprecated.rst
@@ -121,6 +121,21 @@ The following is a list of deprecated interfaces.
      - 4.0
      - ``sphinx.domains.citation.CitationDomain.resolve_xref()``
 
+   * - ``sphinx.domains.std.StandardDomain.note_citations()``
+     - 2.1
+     - 4.0
+     - ``sphinx.domains.citation.CitationDomain.note_citation()``
+
+   * - ``sphinx.domains.std.StandardDomain.note_citation_refs()``
+     - 2.1
+     - 4.0
+     - ``sphinx.domains.citation.CitationDomain.note_citation_reference()``
+
+   * - ``sphinx.domains.std.StandardDomain.note_labels()``
+     - 2.1
+     - 4.0
+     - ``sphinx.domains.std.StandardDomain.process_doc()``
+
    * - ``sphinx.environment.NoUri``
      - 2.1
      - 4.0
diff --git a/sphinx/domains/std.py b/sphinx/domains/std.py
index 188a20f0c..865e0e383 100644
--- a/sphinx/domains/std.py
+++ b/sphinx/domains/std.py
@@ -959,6 +959,21 @@ class StandardDomain(Domain):
         else:
             return None
 
+    def note_citations(self, env, docname, document):
+        # type: (BuildEnvironment, str, nodes.document) -> None
+        warnings.warn('StandardDomain.note_citations() is deprecated.',
+                      RemovedInSphinx40Warning)
+
+    def note_citation_refs(self, env, docname, document):
+        # type: (BuildEnvironment, str, nodes.document) -> None
+        warnings.warn('StandardDomain.note_citation_refs() is deprecated.',
+                      RemovedInSphinx40Warning)
+
+    def note_labels(self, env, docname, document):
+        # type: (BuildEnvironment, str, nodes.document) -> None
+        warnings.warn('StandardDomain.note_labels() is deprecated.',
+                      RemovedInSphinx40Warning)
+
 
 def setup(app):
     # type: (Sphinx) -> Dict[str, Any]