I don't have anything for this season, but Tyrese Haliburton had the most assists in a 2025 playoff game, with 15 assists on May 27 and on April 27.

Interpreted as:

most assists by a player in 1 game this playoffs

	NAME	AST	DATE	TM		OPP	MIN	PTS	REB	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF	+/-
1	Tyrese Haliburton T. Haliburton	15	5/27/2025	IND	vs	NYK	38	32	12	4	0	11	23	47.8	5	12	41.7	5	6	83.3	62.4	0	12	0	4	+16
2	Tyrese Haliburton T. Haliburton	15	4/27/2025	IND	@	MIL	34	17	8	1	0	6	11	54.5	2	5	40.0	3	4	75.0	66.6	0	8	5	0	+25
3	Tyrese Haliburton T. Haliburton	13	5/31/2025	IND	vs	NYK	37	21	6	3	1	9	17	52.9	2	5	40.0	1	1	100.0	60.2	0	6	4	2	+24
4	Andrew Nembhard A. Nembhard	13	5/6/2025	IND	@	CLE	36	13	7	2	0	5	13	38.5	0	4	0.0	3	5	60.0	42.8	2	5	8	5	+10
5	Tyrese Haliburton T. Haliburton	13	5/4/2025	IND	@	CLE	36	22	3	1	3	9	15	60.0	2	6	33.3	2	2	100.0	69.3	0	3	1	1	+11
6	James Harden J. Harden	13	5/3/2025	LAC	@	DEN	35	7	5	2	1	2	8	25.0	1	4	25.0	2	2	100.0	39.4	0	5	2	0	-29
7	Giannis Antetokounmpo G. Antetokounmpo	13	4/29/2025	MIL	@	IND	44	30	20	2	2	9	17	52.9	1	2	50.0	11	17	64.7	61.3	2	18	7	5	-2
8	Nikola Jokić N. Jokić	13	4/24/2025	DEN	@	LAC	37	23	13	1	0	9	14	64.3	2	3	66.7	3	4	75.0	73.0	1	12	2	1	-20
9	Shai Gilgeous-Alexander S. Gilgeous-Alexander	12	6/22/2025	OKC	vs	IND	40	29	5	1	2	8	27	29.6	2	12	16.7	11	12	91.7	44.9	0	5	1	5	+11
10	Jaylen Brown J. Brown	12	5/14/2025	BOS	vs	NYK	37	26	8	1	0	9	17	52.9	3	5	60.0	5	8	62.5	63.4	2	6	2	2	+28
11	Anthony Edwards A. Edwards	12	5/14/2025	MIN	vs	GSW	41	22	7	1	3	8	15	53.3	5	9	55.6	1	2	50.0	69.3	1	6	7	3	+20
12	Jalen Brunson J. Brunson	12	5/12/2025	NYK	vs	BOS	40	39	5	0	0	14	25	56.0	4	8	50.0	7	9	77.8	67.3	1	4	1	2	+12
13	Julius Randle J. Randle	12	5/10/2025	MIN	@	GSW	40	24	10	3	0	10	23	43.5	1	6	16.7	3	3	100.0	49.3	3	7	4	3	+14
14	Nikola Jokić N. Jokić	12	4/29/2025	DEN	vs	LAC	37	13	10	1	2	4	13	30.8	1	4	25.0	4	5	80.0	42.8	1	9	2	1	+18
15	Tyrese Haliburton T. Haliburton	12	4/22/2025	IND	vs	MIL	35	21	5	0	0	8	19	42.1	3	10	30.0	2	2	100.0	52.8	1	4	3	1	+2
16	Tyrese Haliburton T. Haliburton	12	4/19/2025	IND	vs	MIL	34	10	7	0	0	3	13	23.1	0	7	0.0	4	6	66.7	32.0	0	7	1	2	+27
17	Nikola Jokić N. Jokić	12	4/19/2025	DEN	vs	LAC	46	29	9	3	1	12	24	50.0	1	4	25.0	4	6	66.7	54.4	0	9	2	4	+10
18	Cade Cunningham C. Cunningham	12	4/19/2025	DET	@	NYK	39	21	6	0	0	8	21	38.1	1	4	25.0	4	5	80.0	45.3	1	5	6	3	-6
19	Tyrese Haliburton T. Haliburton	11	6/11/2025	IND	vs	OKC	36	22	9	2	1	9	17	52.9	4	8	50.0	0	0		64.7	1	8	4	1	+1
20	Jalen Brunson J. Brunson	11	5/23/2025	NYK	vs	IND	39	36	3	1	0	13	27	48.1	5	12	41.7	5	5	100.0	61.6	0	3	3	3	+4
21	Tyrese Haliburton T. Haliburton	11	5/23/2025	IND	@	NYK	35	14	8	2	0	5	16	31.3	3	10	30.0	1	2	50.0	41.5	2	6	1	2	-2
22	Tyrese Haliburton T. Haliburton	11	5/21/2025	IND	@	NYK	42	31	4	1	0	12	23	52.2	4	12	33.3	3	4	75.0	62.6	0	4	2	3	+15
23	Josh Hart J. Hart	11	5/16/2025	NYK	vs	BOS	33	10	11	0	0	3	8	37.5	1	3	33.3	3	4	75.0	51.2	3	8	2	4	+24
24	Julius Randle J. Randle	11	5/8/2025	MIN	vs	GSW	33	24	7	0	0	10	17	58.8	1	4	25.0	3	3	100.0	65.5	2	5	2	3	+17
25	Kawhi Leonard K. Leonard	11	4/29/2025	LAC	@	DEN	37	20	9	1	2	8	15	53.3	1	4	25.0	3	7	42.9	55.3	2	7	1	2	-7