Popsugar Entertainment 13 Reasons Why 13 Reasons Why Season 3 Details Here's Everything We Know About 13 Reasons Why Season 3 23 August 2019 by Kelsie Gibson View On One Page Photo 4 of 7 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 4 One of the Main Characters Dies In the first trailer for season three, the big story for the season is revealed: who killed Bryce Walker? Previous Next Start Slideshow 13 Reasons WhyTV