He wrote and produced it along with Eddie Benjamin and Mike Sabath, while Scott Harris was also part of the composition.
[5] "Nobody Knows" was released as the third single by Island Records on September 12, and a music video premiered on the following day at 12 p.m. Eastern Time Zone.
[9] Mendes embarked on a intimate concert tour in the United States to promote Shawn, in which he performed the album's songs "from top to bottom", including "Nobody Knows".
[13] Mendes performed the song on September 11, alonside its co-writers and co-producers Eddie Benjamin and Mike Sabath.
[9] In contrast to the other performances of the ceremony, it was pared down, with Mendes and his accompanying "closest friends" playing guitar and drums.