"These included “Earshot,” an episode of “Buffy the Vampire Slayer” that features a potential school shooter in a clocktower and was originally scheduled to air one week after the Columbine High School shootings occurred; “Mike and Molly” had a tornado-themed season finale episode postponed due to the real-life devastation incurred by the Oklahoma tornadoes; the “Reunion” episode of “Haven,” which featured gun violence occurring in a school, was due to air the very same day that the Sandy Hook shootings took place and was hastily pulled; “Family Guy” episode “Turban Cowboy” showed Peter plowing through the runners at the Boston Marathon, and when the bombings occurred a few months after it aired"
http://www.indiewire.com/2014/07/10-controversial-tv-episode...
There are also movies
"Space Camp was delayed back in 1986 following the Challenger explosion" "Trespass was originally called "The Looters" and (I think) it was set to show prior to the L.A. Riots. It got pushed to Christmas."
https://forum.dvdtalk.com/movie-talk/549045-movies-came-out-...
The only thing that I'm aware of that was pulled(since I was born) because of similar reasons were movies released around 9/11[1].
[1] https://en.wikipedia.org/wiki/List_of_entertainment_affected...