Before 2017-18, the Houston Rockets attempted the most three-pointers per game by a team in a season with 40.3 attempts per game in 2016-17.

most 3pa per game by a team in a season before 2018

TEAM	3PA	SEASON	GP	MPG	PPG	RPG	APG	SPG	BPG	TPG	FGM	FGA	FG%	3PM	3P%	FTM	FTA	FT%	MIN	PTS	REB	AST	STL	BLK	TOV	PF
Houston Rockets	40.3	2016-17	82	241.2	115.3	44.4	25.2	8.2	4.3	15.1	40.3	87.2	46.2	14.4	35.7	20.3	26.5	76.6	19,780	9,458	3,638	2,070	670	352	1,240	1,634
Cleveland Cavaliers	33.9	2016-17	82	242.4	110.3	43.7	22.7	6.6	4.0	13.7	39.9	84.9	47.0	13.0	38.4	17.5	23.3	74.8	19,880	9,048	3,587	1,858	539	327	1,121	1,486
Boston Celtics	33.4	2016-17	82	240.9	108.0	42.0	25.2	7.5	4.1	13.3	38.6	85.1	45.4	12.0	35.9	18.7	23.2	80.7	19,755	8,857	3,442	2,069	617	340	1,088	1,686
Houston Rockets	32.7	2014-15	82	241.5	103.9	43.7	22.2	9.5	5.0	16.7	37.0	83.3	44.4	11.4	34.8	18.6	26.0	71.5	19,805	8,522	3,582	1,820	777	407	1,366	1,803
Golden State Warriors	31.6	2015-16	82	242.4	114.9	46.2	28.9	8.4	6.1	15.2	42.5	87.3	48.7	13.1	41.6	16.7	21.8	76.3	19,880	9,421	3,788	2,373	689	498	1,245	1,701
Brooklyn Nets	31.6	2016-17	82	240.9	105.8	43.9	21.4	7.2	4.7	16.5	37.8	85.2	44.4	10.7	33.8	19.4	24.6	78.8	19,755	8,673	3,600	1,756	593	387	1,356	1,726
Golden State Warriors	31.2	2016-17	82	241.2	115.9	44.4	30.4	9.6	6.8	14.8	43.1	87.1	49.5	12.0	38.3	17.8	22.6	78.8	19,780	9,503	3,643	2,491	785	555	1,211	1,585
Houston Rockets	30.9	2015-16	82	241.8	106.5	43.1	22.2	10.0	5.2	15.9	37.7	83.5	45.2	10.7	34.7	20.4	29.4	69.4	19,830	8,737	3,531	1,821	821	430	1,307	1,790
Dallas Mavericks	30.2	2016-17	82	241.2	97.9	38.6	20.8	7.5	3.7	11.9	36.2	82.3	44.0	10.7	35.5	14.8	18.5	80.1	19,780	8,029	3,163	1,705	614	307	972	1,567
Philadelphia 76ers	29.8	2016-17	82	241.8	102.4	42.8	23.8	8.4	5.1	16.7	37.7	85.3	44.2	10.1	34.0	17.0	22.0	77.1	19,830	8,400	3,513	1,949	692	420	1,366	1,793
Cleveland Cavaliers	29.6	2015-16	82	242.1	104.3	44.5	22.7	6.7	3.9	13.6	38.7	84.0	46.0	10.7	36.2	16.3	21.7	74.8	19,855	8,555	3,650	1,861	551	317	1,114	1,666
Charlotte Hornets	29.4	2015-16	82	242.1	103.4	43.9	21.7	7.3	5.3	12.5	37.0	84.4	43.9	10.6	36.2	18.7	23.7	79.0	19,855	8,479	3,603	1,778	595	438	1,029	1,487
New York Knicks	28.9	2012-13	82	240.6	100.0	40.6	19.3	8.2	3.6	12.0	36.5	81.6	44.8	10.9	37.6	16.0	21.1	75.9	19,730	8,196	3,326	1,579	672	294	988	1,650
Houston Rockets	28.9	2012-13	82	241.2	106.0	43.4	23.2	8.3	4.4	16.4	38.1	82.7	46.1	10.6	36.6	19.2	25.5	75.4	19,780	8,688	3,561	1,902	679	359	1,348	1,662
Denver Nuggets	28.8	2016-17	82	240.9	111.7	46.4	25.3	6.9	3.9	15.0	41.2	87.7	46.9	10.6	36.8	18.7	24.2	77.4	19,755	9,161	3,803	2,077	568	323	1,226	1,567
Charlotte Hornets	28.6	2016-17	82	241.8	104.9	43.6	23.1	7.0	4.8	11.5	37.7	85.4	44.2	10.0	35.1	19.4	23.8	81.5	19,830	8,601	3,574	1,891	571	390	942	1,360
Dallas Mavericks	28.6	2015-16	82	244.0	102.3	43.1	22.1	6.8	3.7	12.8	37.4	84.1	44.4	9.8	34.4	17.7	22.3	79.4	20,005	8,388	3,532	1,813	560	306	1,047	1,595
Portland Trail Blazers	28.5	2015-16	82	241.5	105.1	45.5	21.3	6.9	4.6	14.6	38.6	85.9	45.0	10.5	37.0	17.4	23.0	75.4	19,805	8,622	3,730	1,748	562	380	1,200	1,782
Atlanta Hawks	28.4	2015-16	82	241.8	102.8	42.1	25.6	9.1	5.9	15.0	38.6	84.4	45.8	9.9	35.0	15.6	20.0	78.3	19,830	8,433	3,451	2,100	747	486	1,226	1,570
New York Knicks	27.9	2008-09	82	241.5	105.2	42.1	21.2	7.4	2.5	14.3	38.5	86.5	44.5	10.0	36.0	18.2	23.2	78.4	19,805	8,627	3,456	1,738	610	204	1,174	1,672
Portland Trail Blazers	27.7	2016-17	82	243.0	107.9	43.7	21.1	7.0	5.0	13.7	39.5	86.1	45.9	10.4	37.5	18.5	23.7	78.0	19,930	8,851	3,580	1,733	574	408	1,126	1,736
Philadelphia 76ers	27.5	2015-16	82	241.5	97.4	41.2	21.5	8.3	6.0	16.4	36.2	84.0	43.1	9.3	33.9	15.7	22.6	69.4	19,805	7,988	3,382	1,765	680	495	1,343	1,780
Cleveland Cavaliers	27.5	2014-15	82	241.2	103.1	43.0	22.1	7.4	4.1	14.3	37.7	82.2	45.8	10.1	36.7	17.7	23.6	75.1	19,780	8,457	3,523	1,814	603	340	1,171	1,510
L.A. Clippers	27.4	2016-17	82	240.9	108.7	43.0	22.5	7.5	4.2	13.0	39.5	83.2	47.5	10.3	37.5	19.3	26.0	74.5	19,755	8,911	3,528	1,848	612	347	1,062	1,626
Orlando Magic	27.3	2009-10	82	240.6	102.8	43.2	19.7	6.2	5.6	14.1	36.6	78.0	47.0	10.3	37.5	19.2	26.5	72.4	19,730	8,426	3,546	1,615	512	456	1,155	1,629