A "hat trick" is when a player scores three goals in a game; a "natural hat trick" is when that player scores all three goals in a row, with no other player, teammate or opposition, scoring during that span. read more
Three goals in a row (assuming you mean scored by the same player) would be called a"natural hat-trick". This is in contrast to a normal hat-trick, which would just be when a player scores three goals in a game. The distinction is that a"natural" hat-trick is a string of three uninterrupted goals by one player. read more