function onEdit(e)
{

var range = e.range;
Logger.log(range.getRow());

  if (range.getRow() === 3.0)
  {
    var recipient = "kkk@gmail.com";
    var subject = 'Roster Notification';
    MailApp.sendEmail(recipient, subject, "Hello, your roster has been updated. Please check. Thanks.");
  }
}