Rank Heat Lane Nation Swimmers Time Notes 1 1 4 United States Lia Neal (53.94) Kelsi Worrell (53.27) Olivia Smoliga (53.67) Mallory Comerford (52.47) 3:33.35 Q 2 1 5 Netherlands Maud van der Meer (54.72) Femke Heemskerk (52.72) Kim Busch (54.79) Ranomi Kromowidjojo (52.03) 3:34.26 Q 3 2 4 Australia Emily Seebohm (54.32) Madison Wilson (53.94) Brittany Elmslie (53.61) Shayna Jack (53.31) 3:35.18 Q 4 1 1 Sweden Michelle Coleman (53.21) Sarah Sjöström (52.19) Nathalie Lindborg (55.90) Louise Hansson (54.20) 3:35.50 Q 5 2 5 Canada Sandrine Mainville (53.87) Michelle Toro (54.50) Rebecca Smith (53.93) Kayla Sanchez (53.54) 3:35.84 Q 6 2 6 China Zhu Menghui (54.06) Ai Yanhan (54.71) Wu Yue (54.46) Zhang Yufei (53.79) 3:37.02 Q 7 1 3 Japan Rikako Ikee (54.09) Tomomi Aoki (54.34) Yui Yamane (54.59) Chihiro Igarashi (54.44) 3:37.46 Q 8 1 6 Denmark Signe Bro (54.85) Sarah Bro (55.60) Emilie Beckmann (55.55) Pernille Blume (52.29) 3:38.29 Q 9 2 2 Hungary Flóra Molnár (54.93) Fanni Gyurinovics (55.16) Evelyn Verrasztó (54.73) Zsuzsanna Jakabos (54.08) 3:38.90 10 2 3 Italy Silvia Di Pietro (54.80) Erika Ferraioli (54.91) Giorgia Biondani (55.47) Federica Pellegrini (53.90) 3:39.08 11 2 1 Israel Andrea Murez (54.79) Zohar Shikler (56.75) Keren Siebner (56.03) Amit Ivry (56.78) 3:44.35 12 1 2 Hong Kong Siobhan Haughey (53.99) Claudia Lau (56.26) Ho Nam Wai (57.48) Sze Hang Yu (56.66) 3:44.39 13 2 7 South Africa Erin Gallagher (55.94) Kate Beavon (59.98) Samantha Randle (1:00.68) Kaylene Corbett (1:01.23) 3:57.83 14 1 7 Slovakia 99:99 !DNS