I couldn't find anything for this season, but Mike Muscala had the most three-point attempts by an inactive or retired player in 2023-24, with 96 attempts.

most threes attempted by a retired player this regular season

	NAME	3PA	SEASON	TM	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
1	Mike Muscala M. Muscala	96	2023-24	TOT	53	11.3	3.0	2.4	0.7	0.2	0.2	1.1	2.9	35.9	0.5	29.2	0.3	0.5	68.0	47.0	0.7	1.6	0.4	600	157	125	36	9	13	22	52	-90
2	Gordon Hayward G. Hayward	90	2023-24	TOT	51	24.4	9.8	3.5	3.1	0.8	0.3	3.7	7.9	46.4	0.7	41.1	1.7	2.4	74.2	54.8	0.7	2.8	1.3	1,245	500	181	158	40	13	66	67	-134
3	Jontay Porter J. Porter	60	2023-24	TOR	26	13.8	4.4	3.2	2.3	0.8	0.8	1.5	4.0	38.5	0.8	33.3	0.6	0.7	83.3	51.4	1.0	2.2	0.8	360	115	82	60	20	20	21	35	-72
4	Derrick Rose D. Rose	41	2023-24	MEM	24	16.6	8.0	1.9	3.3	0.3	0.1	3.2	6.9	46.1	0.6	36.6	1.0	1.1	88.9	54.0	0.3	1.6	1.3	399	191	45	78	8	2	31	21	-33
5	Joe Harris J. Harris	30	2023-24	DET	16	10.6	2.4	0.8	0.6	0.2	0.1	0.9	2.4	35.9	0.6	33.3	0.1	0.1	50.0	48.9	0.2	0.6	0.3	170	39	13	10	3	2	4	19	-48
6	Otto Porter Jr. O. Porter Jr.	23	2023-24	TOR	15	11.6	2.6	1.9	0.5	0.3	0.3	0.9	2.2	42.4	0.5	34.8	0.2	0.2	100.0	56.8	0.4	1.5	0.1	174	39	29	8	5	5	2	19	+22
7	Zavier Simpson Z. Simpson	17	2023-24	MEM	7	23.0	6.0	2.9	3.6	1.0	0.4	2.4	7.7	31.5	0.7	29.4	0.4	0.6	75.0	37.7	0.6	2.3	1.4	161	42	20	25	7	3	10	11	-29
8	Ish Smith I. Smith	8	2023-24	CHA	43	17.2	3.2	1.8	3.4	0.4	0.1	1.5	3.7	41.8	0.1	50.0	0.1	0.1	75.0	43.5	0.3	1.5	1.1	741	139	76	145	17	4	47	49	-280
9	RJ Hampton	8	2023-24	MIA	8	9.5	1.3	0.8	1.0	0.0	0.0	0.5	1.8	28.6	0.1	12.5	0.1	0.3	50.0	33.6	0.3	0.5	0.4	76	10	6	8	0	0	3	8	+21
10	D.J. Wilson	2	2023-24	PHI	2	7.5	5.0	1.0	1.0	0.0	1.0	2.0	3.0	66.7	1.0	100.0	0.0	0.0		83.3	0.5	0.5	0.0	15	10	2	2	0	2	0	1	+2
11	Danny Green D. Green	1	2023-24	PHI	2	9.0	0.0	1.0	0.5	0.5	0.0	0.0	1.0	0.0	0.0	0.0	0.0	0.0		0.0	0.0	1.0	0.0	18	0	2	1	1	0	0	1	0