diff --git a/references/list.json b/references/list.json
index 66c628a..fe4907e 100644
--- a/references/list.json
+++ b/references/list.json
@@ -1101,5 +1101,201 @@
           "Uterus, NOS",
           "Vagina",
           "Vulva"
-   ]
+   ],
+  "country": [
+      "Afghanistan",
+      "Albania",
+      "Algeria",
+      "Andorra",
+      "Angola",
+      "Antigua and Barbuda",
+      "Argentina",
+      "Armenia",
+      "Australia",
+      "Austria",
+      "Azerbaijan",
+      "Bahamas",
+      "Bahrain",
+      "Bangladesh",
+      "Barbados",
+      "Belarus",
+      "Belgium",
+      "Belize",
+      "Benin",
+      "Bhutan",
+      "Bolivia (Plurinational State of)",
+      "Bosnia and Herzegovina",
+      "Botswana",
+      "Brazil",
+      "Brunei Darussalam",
+      "Bulgaria",
+      "Burkina Faso",
+      "Burundi",
+      "Cabo Verde",
+      "Cambodia",
+      "Cameroon",
+      "Canada",
+      "Central African Republic",
+      "Chad",
+      "Chile",
+      "China",
+      "Colombia",
+      "Comoros",
+      "Congo",
+      "Costa Rica",
+      "Croatia",
+      "Cuba",
+      "Cyprus",
+      "Czechia",
+      "Democratic People’s Republic of Korea",
+      "Democratic Republic of the Congo",
+      "Denmark",
+      "Djibouti",
+      "Dominica",
+      "Dominican Republic",
+      "Ecuador",
+      "Egypt",
+      "El Salvador",
+      "Equatorial Guinea",
+      "Eritrea",
+      "Estonia",
+      "Eswatini",
+      "Ethiopia",
+      "Fiji",
+      "Finland",
+      "France",
+      "Gabon",
+      "Gambia",
+      "Georgia",
+      "Germany",
+      "Ghana",
+      "Greece",
+      "Grenada",
+      "Guatemala",
+      "Guinea",
+      "Guinea-Bissau",
+      "Guyana",
+      "Haiti",
+      "Honduras",
+      "Hungary",
+      "Iceland",
+      "India",
+      "Indonesia",
+      "Iran (Islamic Republic of)",
+      "Iraq",
+      "Ireland",
+      "Israel",
+      "Italy",
+      "Jamaica",
+      "Japan",
+      "Jordan",
+      "Kazakhstan",
+      "Kenya",
+      "Kiribati",
+      "Kuwait",
+      "Kyrgyzstan",
+      "Lao People’s Democratic Republic",
+      "Latvia",
+      "Lebanon",
+      "Lesotho",
+      "Liberia",
+      "Libya",
+      "Liechtenstein",
+      "Lithuania",
+      "Luxembourg",
+      "Madagascar",
+      "Malawi",
+      "Malaysia",
+      "Maldives",
+      "Mali",
+      "Malta",
+      "Marshall Islands",
+      "Mauritania",
+      "Mauritius",
+      "Mexico",
+      "Micronesia (Federated States of)",
+      "Monaco",
+      "Mongolia",
+      "Montenegro",
+      "Morocco",
+      "Mozambique",
+      "Myanmar",
+      "Namibia",
+      "Nauru",
+      "Nepal",
+      "Netherlands",
+      "New Zealand",
+      "Nicaragua",
+      "Niger",
+      "Nigeria",
+      "North Macedonia",
+      "Norway",
+      "Oman",
+      "Pakistan",
+      "Palau",
+      "Panama",
+      "Papua New Guinea",
+      "Paraguay",
+      "Peru",
+      "Philippines",
+      "Poland",
+      "Portugal",
+      "Qatar",
+      "Republic of Korea",
+      "Republic of Moldova",
+      "Romania",
+      "Russian Federation",
+      "Rwanda",
+      "Saint Kitts and Nevis",
+      "Saint Lucia",
+      "Saint Vincent and the Grenadines",
+      "Samoa",
+      "San Marino",
+      "Sao Tome and Principe",
+      "Saudi Arabia",
+      "Senegal",
+      "Serbia",
+      "Seychelles",
+      "Sierra Leone",
+      "Singapore",
+      "Slovakia",
+      "Slovenia",
+      "Solomon Islands",
+      "Somalia",
+      "South Africa",
+      "South Sudan",
+      "Spain",
+      "Sri Lanka",
+      "Sudan",
+      "Suriname",
+      "Sweden",
+      "Switzerland",
+      "Syrian Arab Republic",
+      "Tajikistan",
+      "Thailand",
+      "Timor-Leste",
+      "Togo",
+      "Tonga",
+      "Trinidad and Tobago",
+      "Tunisia",
+      "Turkey",
+      "Turkmenistan",
+      "Tuvalu",
+      "Uganda",
+      "Ukraine",
+      "United Arab Emirates",
+      "United Kingdom of Great Britain and Northern Ireland",
+      "United Republic of Tanzania",
+      "United States of America",
+      "Uruguay",
+      "Uzbekistan",
+      "Vanuatu",
+      "Venezuela (Bolivarian Republic of)",
+      "Viet Nam",
+      "Yemen",
+      "Zambia",
+      "Zimbabwe",
+      "Holy See",
+      "State of Palestine"
+    ]
 }
diff --git a/schemas/donor.json b/schemas/donor.json
index 820629c..54f72fe 100644
--- a/schemas/donor.json
+++ b/schemas/donor.json
@@ -280,6 +280,17 @@
         "foreignKey": "primary_diagnosis.submitter_primary_diagnosis_id",
         "validationDependency": true
       }
+    },
+    {
+      "description": "Indicate the donor's country of residence at the time they were enrolled in the study. The country list include 193 UN member states plus 2 UN observer states. Source: https://www.un.org/en/about-us/member-states",
+      "name": "country_of_residence_at_enrollment",
+      "valueType": "string",
+      "restrictions": {
+        "codeList": "#/list/country"
+      },
+      "meta": { 
+        "displayName": "Country of Residence at Enrollment" 
+      }
     }
   ]
 }