I don't have anything for this season, but Stephen Curry had his lowest plus/minus in a game in 2024-25 against the Grizzlies on December 19, at -41.

Interpreted as:

steph curry worst +- regular-season game this season

	NAME	+/-	DATE	TM		OPP	MIN	PTS	REB	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF
1	Stephen Curry S. Curry	-41	12/19/2024	GSW	@	MEM	24	2	3	1	1	1	0	7	0.0	0	6	0.0	2	2	100.0	12.7	0	3	2	0
2	Stephen Curry S. Curry	-25	11/8/2024	GSW	@	CLE	24	12	1	2	2	0	5	10	50.0	1	4	25.0	1	1	100.0	57.5	0	1	6	0
3	Stephen Curry S. Curry	-21	2/5/2025	GSW	@	UTA	35	32	1	7	0	1	12	31	38.7	6	18	33.3	2	2	100.0	50.2	0	1	3	2
4	Stephen Curry S. Curry	-18	1/31/2025	GSW	vs	PHX	31	14	3	3	0	2	5	14	35.7	1	6	16.7	3	3	100.0	45.7	1	2	2	1
5	Stephen Curry S. Curry	-17	1/25/2025	GSW	vs	LAL	32	13	1	9	2	0	4	17	23.5	2	9	22.2	3	4	75.0	34.6	0	1	3	2
6	Stephen Curry S. Curry	-17	1/5/2025	GSW	vs	SAC	30	26	7	0	1	0	8	12	66.7	4	8	50.0	6	6	100.0	88.8	0	7	4	3
7	Stephen Curry S. Curry	-16	4/13/2025	GSW	vs	LAC	38	36	3	6	2	0	10	20	50.0	7	12	58.3	9	9	100.0	75.1	1	2	8	2
8	Stephen Curry S. Curry	-16	3/6/2025	GSW	@	BKN	36	40	4	4	0	0	12	20	60.0	7	13	53.8	9	9	100.0	83.5	2	2	5	3
9	Stephen Curry S. Curry	-15	1/20/2025	GSW	vs	BOS	27	18	3	4	2	0	6	16	37.5	4	12	33.3	2	2	100.0	53.3	0	3	3	3
10	Stephen Curry S. Curry	-14	1/9/2025	GSW	@	DET	36	17	9	6	2	0	5	21	23.8	2	14	14.3	5	5	100.0	36.6	1	8	3	0
11	Stephen Curry S. Curry	-10	1/7/2025	GSW	vs	MIA	33	31	7	0	1	2	11	22	50.0	8	17	47.1	1	1	100.0	69.1	0	7	4	2
12	Stephen Curry S. Curry	-10	12/15/2024	GSW	vs	DAL	35	26	5	10	1	0	9	19	47.4	7	13	53.8	1	1	100.0	66.9	0	5	2	1
13	Stephen Curry S. Curry	-7	3/20/2025	GSW	vs	TOR	25	17	2	1	0	1	6	8	75.0	2	4	50.0	3	5	60.0	83.3	0	2	3	0
14	Stephen Curry S. Curry	-7	3/17/2025	GSW	vs	DEN	36	20	4	7	3	0	6	21	28.6	4	14	28.6	4	4	100.0	43.9	0	4	7	2
15	Stephen Curry S. Curry	-5	3/15/2025	GSW	vs	NYK	35	28	7	5	0	1	8	20	40.0	4	13	30.8	8	9	88.9	58.4	0	7	3	2
16	Stephen Curry S. Curry	-5	11/18/2024	GSW	@	LAC	32	26	7	6	0	1	10	21	47.6	6	15	40.0	0	0		61.9	1	6	3	1
17	Stephen Curry S. Curry	-4	4/6/2025	GSW	vs	HOU	33	3	2	8	0	0	1	10	10.0	1	8	12.5	0	0		15.0	0	2	4	0
18	Stephen Curry S. Curry	-4	11/25/2024	GSW	vs	BKN	29	28	4	7	1	0	8	17	47.1	8	16	50.0	4	4	100.0	74.6	0	4	3	0
19	Stephen Curry S. Curry	-3	2/6/2025	GSW	@	LAL	37	37	7	4	1	1	13	35	37.1	6	20	30.0	5	5	100.0	49.7	2	5	4	3
20	Stephen Curry S. Curry	-3	12/6/2024	GSW	vs	MIN	32	23	2	4	0	0	6	17	35.3	3	9	33.3	8	8	100.0	56.0	1	1	3	0
21	Stephen Curry S. Curry	-2	1/29/2025	GSW	vs	OKC	33	21	1	4	1	0	6	15	40.0	5	10	50.0	4	4	100.0	62.6	0	1	0	2
22	Stephen Curry S. Curry	-2	12/30/2024	GSW	vs	CLE	29	11	2	3	1	1	4	14	28.6	3	11	27.3	0	0		39.3	0	2	1	1
23	Stephen Curry S. Curry	-1	4/3/2025	GSW	@	LAL	34	37	3	6	0	0	10	21	47.6	4	11	36.4	13	14	92.9	68.1	1	2	2	1
24	Stephen Curry S. Curry	-1	1/15/2025	GSW	@	MIN	37	31	1	8	1	0	10	21	47.6	7	12	58.3	4	4	100.0	68.1	1	0	1	1
25	Stephen Curry S. Curry	-1	12/25/2024	GSW	vs	LAL	36	38	1	6	0	0	14	24	58.3	8	15	53.3	2	2	100.0	76.4	0	1	4	3