There seems to finally be an update as to why Taryn Terrell was released suddenly from Impact Wrestling after only being back with the company for three weeks, and it stems from the issue of Impact filming in Canada. According to Dave Meltzer of the Wrestling Observer, Terrell was granted her release due to being unable to gain entry into the Country.
This is same situation Jim Cornette found himself in recently, thus he was also forced to leave the company.
Meltzer noted than Terrell and Impact Wrestling left on good terms and that it's possible for Terrell to return to the company once they finish filming in Canada.
Terrell was originally slated in the Fatal 4 Way Knockouts match at Bound For Glory along with Gail Kim, Sienna, and Allie, but was abruptly dropped from the match as the announcers explained that the doctors wouldn't allow her to compete due to a slap she suffered from Gail Kim a week prior.