[10] In January 2015, he starred in SM Entertainment's hologram musical, School OZ, playing the character of Hans alongside labelmates Changmin, Key, Luna, Xiumin and Seulgi.

[15] In July 2016, Suho and fellow Exo member Chen released a duet titled "Beautiful Accident" as an original soundtrack for the Chinese movie of the same name.

[23] In May 2018, Suho returned to the small screen with the South Korean adaption of the 2012 Japanese drama Rich Man, Poor Woman, playing the role of an IT company founder (portrayed by Shun Oguri in the original).

[27] From July to August 2018, Suho starred in the musical The Man Who Laughs in the role of Gwynplaine, a pure character with a monster-like face.

[29] On October 28, 2019, a VR Film titled "The Present" is released in which Suho played the role of a young entrepreneur Ha-Neul, along with actors like Shin Ha-Kyun and Kim Seul-gi.

[38] On March 10, 2022, it was confirmed that Suho would release his second mini album Grey Suit and its lead single of the same name on April 4, 2022, which was his first comeback following his discharge from the military.

[40] On October 27, Suho released "Call me a Freak", a single from the original soundtrack for Korean television series Bad Prosecutor, which stars fellow Exo member D.O.

[41] In March 2023, it was revealed that Suho had been cast as the title role in the South Korean musical production Mozart!, which is set to run from June to August at the Sejong Center in Seoul.

[50] In April 2024, Suho alongside several South Korean entertainers joined Green Heart Bazaar, a fundraiser organized by UNICEF Korea to aid Palestinian children in Gaza Strip affected by the Israel–Hamas war.

[73] On March 24, 2024, SM Entertainment announced that Suho will be holding a two-day concerts "Su:Home" at Olympic Hall on May 25-26, 2024 in Seoul, South Korea.

[101][better source needed] On November 28, the encore concert was announced to held at Seoul's Olympic Handball Gymnasium on January 25-26, 2025.