In January 2016, Sonnett joined the national team for their first training camp of the year at the U.S. Soccer National Training Center in Carson, California and earned her second start in a friendly against the Republic of Ireland that same month. In February 2016, Sonnett was named to the USWNT roster for the 2016 CONCACAF Olympic Qualifying tournament, playing in two of the five games in the tournament. The USWNT's semi-final win over Trinidad and Tobago qualified the team for the 2016 Rio Olympics. The USWNT then went on to win CONCACAF title for the fourth consecutive year.