Raising a new, unrelated issue in an attempt to draw the other party’s attention away from the real issue.
Unlike the Straw Man Fallacy, there is no mis-representation of the opponent’s statements or beliefs. Rather the point is to divert the object of the debate (1)
Person A: "Fast food is unhealthy because it’s high in fat, sugar, and salt, which can lead to obesity and heart disease."
Person B: "Well, there are so many starving people in the world who would be happy to have any food at all!"
In this example, Person B is committing a red herring fallacy by diverting the conversation to world hunger, which is unrelated to the health risks of fast food that Person A is talking about.