I’ve never heard of a mercy rule being implemented in college baseball, but according to Wikipedia (for what that’s worth) it’s available. The IBAF rule mentioned is 10+ runs lead after 7 complete innings.
“In regular season or conference tournament NCAA and NAIA college baseball, the IBAF rule may be implemented. Most NCAA conferences limit the rule to the final day of a series, for travel reasons, or primarily during conference tournaments where four to five games are played in a day, in order to allow the next game to start. The rule is not allowed in NCAA tournament play (regionals, super regionals and College World Series), in which all games must be at least nine innings.”