Despite parliament being in summer recess, Prime Minister Petteri Orpo suspended all official duties for the day, honoring Peltonen with a minute of silence, as did parliamentary speaker Jussi Halla-aho, who acknowledged the deep respect Peltonen garnered from colleagues. Emergency services were alerted to the situation at the Eduskuntatalo parliamentary building, confirming Peltonen's death approximately three hours later, while police stated there was no indication of foul play.

Elected to parliament in 2023 representing Uusimaa, Peltonen was a rising star in Finnish politics, having begun his journey as a city councillor in Järvenpää at age 18. Earlier this summer, he had communicated via social media about his struggle with health issues, mentioning a kidney problem that had led him to take time off to recover. As Finland grapples with this tragic loss, support resources are available for those impacted by the news.