diff --git a/intl/uconv/src/charsetData.properties b/intl/uconv/src/charsetData.properties
index ddb57f6f531..668222e7b8e 100644
--- a/intl/uconv/src/charsetData.properties
+++ b/intl/uconv/src/charsetData.properties
@@ -77,6 +77,7 @@ iso-2022-kr.LangGroup              = ko
 iso-8859-1.LangGroup               = x-western
 iso-8859-15.LangGroup              = x-western
 iso-8859-2.LangGroup               = x-central-euro
+iso-8859-3.LangGroup               = x-western
 iso-8859-4.LangGroup               = x-baltic
 iso-8859-13.LangGroup              = x-baltic
 iso-8859-5.LangGroup               = x-cyrillic