Effective December 1, 2013, an amendment to Federal Rule of Criminal Procedure 11(b)(1) takes effect that requires a judge, during a plea colloquy, to inform the defendant and ensure that he understands that "if convicted, a defendant who is not a United States citizen may be removed from the United States, denied citizenship, and denied admission to the United States in the future." FRCP 11(b)(1)(O). This amendment is intended to implement the holding in Padilla v. Kentucky, 130 S. Ct. 1473 (2010).

For information on the background of this amendment, see http://www.gpo.gov/fdsys/pkg/CDOC-113hdoc25/pdf/CDOC-113hdoc25.pdf
Thanks to Raymond R. Bolourtchi

Note: The courts advisal does not relieve defense counsel from the duties flowing from Padilla. For example, in Padilla itself, the trial court gave Kentuckys version of the new Rule 11 warning of possible immigration consequences, but Padilla ruled counsel must investigate and advise the defendant of the actual immigration consequences of the plea anyway.