Rule 403 Federal Rules of Evidence
Rule 403 of the Federal Rules of Evidence is about Excluding Relevant Evidence for Prejudice, Confusion, Waste of Time, or Other Reasons. It is under Article IV (Relevance and Its Limits) of the Rules.
The court may exclude relevant evidence if its probative value is substantially outweighed by a danger of one or more of the following: unfair prejudice, confusing the issues, misleading the jury, undue delay, wasting time, or needlessly presenting cumulative evidence.