"Ellipse defined. An ellipsis is the omission of a word, phrase, line, paragraph, or more from a quoted passage. Such omissions are made of material that is considered irrelevant to the discussion at hand (or, occasionally, to adjust the grammar of the surrounding text). Chicago style is to indicate such omissions by the use of three spaced periods rather than by another device such as asterisks. These points (or dots) are called ellipsis points when they indicate an ellipsis and suspension points when they indicate suspended or interrupted thought. They must always appear together on the same line (through the use of nonbreaking spaces, available in most software applications), along with any following punctuation (including a period) will appear at the end of the line above."
Chicago Manual of Style: Sixteenth Edition