Savannah Guthrie made a sudden exit during Wednesday’s “Today” show. After 90 minutes into the broadcast, Savannah’s co-host, Craig Melvin, announced that she was done for the day. “Savannah had to leave a little early,” he told viewers, adding, “She’ll be right back tomorrow, though.” No other explanation was given, and Savannah has yet to address the moment on her social media accounts. However, a source told Page Six Savannah left “for some sort of appointment, and her exit had nothing to do with her mom.” Page Six reached out to reps for “Today,” but didn’t receive an immediate response. Savannah Guthrie abruptly left “Today” mid-show on Wednesday. (She is seen here on the morning show in March.) Her “Today” show co-anchor, Craig Melvin, told viewers that she “had to leave a little early,” but gave no further explanation. (Savannah is seen here on set of the NBC morning show last month.) INSTARimages Savannah’s abrupt exit comes as her mother, 84-year-old Nancy Guthrie, remains missing.…