As the sorority grew, Sigma Lambda Gamma's membership became more multicultural. In acknowledging this, the organization, which was a part of the National Association of Latino Fraternal Organizations (NALFO) from January 2001 to May 2010, left due to a desire for autonomy and due to their increasing multicultural membership. The sorority celebrated their 100th and 101st chapters simultaneously with the addition of the Theta Delta chapter at Columbia University and the Iota Delta chapter at Millikin University in 2010, having expanded to more than 100 chapters in 20 years.