diff --git a/public/language/en-GB/flags.json b/public/language/en-GB/flags.json
index fb8708fc16..a8bd07ad4f 100644
--- a/public/language/en-GB/flags.json
+++ b/public/language/en-GB/flags.json
@@ -43,6 +43,9 @@
 	"notes": "Flag Notes",
 	"add-note": "Add Note",
 	"no-notes": "No shared notes.",
+	"delete-note-confirm": "Are you sure you want to delete this flag note?",
+	"note-added": "Note Added",
+	"note-deleted": "Note Deleted",
 
 	"history": "Account & Flag History",
 	"no-history": "No flag history.",
@@ -53,7 +56,6 @@
 	"state-resolved": "Resolved",
 	"state-rejected": "Rejected",
 	"no-assignee": "Not Assigned",
-	"note-added": "Note Added",
 
 	"modal-title": "Report Inappropriate Content",
 	"modal-body": "Please specify your reason for flagging %1 %2 for review. Alternatively, use one of the quick report buttons if applicable.",
diff --git a/public/src/client/flags/detail.js b/public/src/client/flags/detail.js
index b847b4391f..bd509831ef 100644
--- a/public/src/client/flags/detail.js
+++ b/public/src/client/flags/detail.js
@@ -8,7 +8,7 @@ define('forum/flags/detail', ['forum/flags/list', 'components', 'translator', 'b
 		$('#state').val(ajaxify.data.state).removeAttr('disabled');
 		$('#assignee').val(ajaxify.data.assignee).removeAttr('disabled');
 
-		$('[data-action]').on('click', function () {
+		$('#content > div').on('click', '[data-action]', function () {
 			var action = this.getAttribute('data-action');
 			var uid = $(this).parents('[data-uid]').attr('data-uid');
 
@@ -75,6 +75,26 @@ define('forum/flags/detail', ['forum/flags/list', 'components', 'translator', 'b
 				case 'restore-post':
 					postAction('restore', ajaxify.data.target.pid, ajaxify.data.target.tid);
 					break;
+
+				case 'delete-note':
+					var datetime = this.closest('[data-datetime]').getAttribute('data-datetime');
+					bootbox.confirm('[[flags:delete-note-confirm]]', function (ok) {
+						if (ok) {
+							socket.emit('flags.deleteNote', {
+								flagId: ajaxify.data.flagId,
+								datetime: datetime,
+							}, function (err, payload) {
+								if (err) {
+									return app.alertError(err.message);
+								}
+
+								app.alertSuccess('[[flags:note-deleted]]');
+								Detail.reloadNotes(payload.notes);
+								Detail.reloadHistory(payload.history);
+							});
+						}
+					});
+					break;
 			}
 		});
 
diff --git a/src/flags.js b/src/flags.js
index 6668895098..5c0987c212 100644
--- a/src/flags.js
+++ b/src/flags.js
@@ -228,6 +228,21 @@ Flags.validate = async function (payload) {
 
 Flags.getNotes = async function (flagId) {
 	let notes = await db.getSortedSetRevRangeWithScores('flag:' + flagId + ':notes', 0, -1);
+	notes = await modifyNotes(notes);
+	return notes;
+};
+
+Flags.getNote = async function (flagId, datetime) {
+	let notes = await db.getSortedSetRangeByScoreWithScores('flag:' + flagId + ':notes', 0, 1, datetime, datetime);
+	if (!notes.length) {
+		throw new Error('[[error:invalid-data]]');
+	}
+
+	notes = await modifyNotes(notes);
+	return notes[0];
+};
+
+async function modifyNotes(notes) {
 	const uids = [];
 	notes = notes.map(function (note) {
 		const noteObj = JSON.parse(note.value);
@@ -245,6 +260,15 @@ Flags.getNotes = async function (flagId) {
 		note.content = validator.escape(note.content);
 		return note;
 	});
+}
+
+Flags.deleteNote = async function (flagId, datetime) {
+	const note = await db.getSortedSetRangeByScore('flag:' + flagId + ':notes', 0, 1, datetime, datetime);
+	if (!note.length) {
+		throw new Error('[[error:invalid-data]]');
+	}
+
+	await db.sortedSetRemove('flag:' + flagId + ':notes', note[0]);
 };
 
 Flags.create = async function (type, id, uid, reason, timestamp) {
diff --git a/src/socket.io/flags.js b/src/socket.io/flags.js
index e2c9a56215..9d72101c37 100644
--- a/src/socket.io/flags.js
+++ b/src/socket.io/flags.js
@@ -62,4 +62,23 @@ SocketFlags.appendNote = async function (socket, data) {
 	return { notes: notes, history: history };
 };
 
+SocketFlags.deleteNote = async function (socket, data) {
+	if (!data || !(data.flagId && data.datetime)) {
+		throw new Error('[[error:invalid-data]]');
+	}
+
+	const note = await flags.getNote(data.flagId, data.datetime);
+	if (note.uid !== socket.uid) {
+		throw new Error('[[error:no-privileges]]');
+	}
+
+	await flags.deleteNote(data.flagId, data.datetime);
+
+	const [notes, history] = await Promise.all([
+		flags.getNotes(data.flagId),
+		flags.getHistory(data.flagId),
+	]);
+	return { notes: notes, history: history };
+};
+
 require('../promisify')(SocketFlags);