In January 2018, Sonnett was called up to her third consecutive January training camp with the USWNT. In February she attended the pre-SheBelieves Cup training camp and was ultimately named to the 23-player roster for the 2018 SheBelieves Cup for the third consecutive year. Sonnett was called up for both the January and February training camps and was named to the roster for the 2017 SheBelieves Cup tournament in March but did not see any playing time. Sonnett dropped out of the USWNT rotation for the majority of 2017 and did not earn any international caps during the calendar year.