League table rankings for the third quarter of 2016 show global transactional volume plummeting in the aftermath of the U.K.’s mid-June vote to leave the European Union.

Global and European M&A deal volume in the third quarter slipped to its lowest levels in three years, according to data released last week by Mergermarket and cited by London-based sibling publication Legal Week. Global deal volume was down 20 percent from the same time last year.