This is a timeline of the Commonwealth of Nations from the Balfour Declaration. Some regard the Balfour Declaration as the foundation of the modern Commonwealth.
2000s
2016 - October - the Maldives withdrew from the Commonwealth.
2017 - The Gambia begins the process of returning to the Commonwealth under the new Gambian Government of President Adama Barrow.
References
Timeline of the Commonwealth of Nations Wikipedia(Text) CC BY-SA