I didn't find anything for this season, but Cedi Osman scored his most points in a game in 2023-24 versus the Wizards on January 29, 2024, with 20 points.

Interpreted as:

Cedi Osman best regular-season game points this season

	NAME	PTS	DATE	TM		OPP	MIN	REB	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF	+/-
1	Cedi Osman C. Osman	20	1/29/2024	SAS	vs	WAS	29	3	2	2	0	8	12	66.7	4	6	66.7	0	0		83.3	2	1	0	1	-5
2	Cedi Osman C. Osman	18	3/31/2024	SAS	vs	GSW	36	2	1	1	0	7	12	58.3	4	7	57.1	0	0		75.0	1	1	2	1	-9
3	Cedi Osman C. Osman	17	11/20/2023	SAS	vs	LAC	23	5	1	0	0	7	10	70.0	2	4	50.0	1	1	100.0	81.4	2	3	0	4	-11
4	Cedi Osman C. Osman	15	12/15/2023	SAS	vs	LAL	25	2	6	0	0	6	11	54.5	3	6	50.0	0	0		68.2	0	2	0	2	+13
5	Cedi Osman C. Osman	14	12/17/2023	SAS	vs	NOP	17	3	0	0	0	5	7	71.4	1	2	50.0	3	4	75.0	79.9	0	3	1	2	-11
6	Cedi Osman C. Osman	14	10/27/2023	SAS	vs	HOU	23	2	1	0	0	5	7	71.4	4	6	66.7	0	0		100.0	0	2	3	1	+9
7	Cedi Osman C. Osman	13	1/4/2024	SAS	vs	MIL	28	2	5	3	0	4	7	57.1	3	6	50.0	2	3	66.7	78.1	0	2	1	3	+10
8	Cedi Osman C. Osman	13	11/18/2023	SAS	vs	MEM	24	5	1	1	0	4	10	40.0	3	7	42.9	2	2	100.0	59.7	2	3	1	1	-21
9	Cedi Osman C. Osman	13	11/2/2023	SAS	@	PHX	22	2	1	1	0	5	8	62.5	3	6	50.0	0	0		81.3	0	2	0	1	-16
10	Cedi Osman C. Osman	12	10/29/2023	SAS	@	LAC	17	1	1	1	1	4	7	57.1	2	4	50.0	2	2	100.0	76.1	0	1	0	1	-5
11	Cedi Osman C. Osman	12	10/25/2023	SAS	vs	DAL	22	0	2	0	1	5	10	50.0	2	6	33.3	0	0		60.0	0	0	0	2	-11
12	Cedi Osman C. Osman	11	1/12/2024	SAS	vs	CHA	14	4	1	1	0	4	4	100.0	2	2	100.0	1	2	50.0	112.7	1	3	3	2	+3
13	Cedi Osman C. Osman	11	1/10/2024	SAS	@	DET	21	6	3	2	0	4	6	66.7	1	3	33.3	2	3	66.7	75.1	1	5	0	0	+14
14	Cedi Osman C. Osman	11	12/1/2023	SAS	@	NOP	27	2	5	0	1	4	9	44.4	2	5	40.0	1	2	50.0	55.7	0	2	0	3	-17
15	Cedi Osman C. Osman	11	11/24/2023	SAS	@	GSW	18	1	0	0	0	5	11	45.5	1	6	16.7	0	0		50.0	1	0	1	3	-3
16	Cedi Osman C. Osman	10	4/2/2024	SAS	@	DEN	18	3	1	0	0	4	7	57.1	2	4	50.0	0	0		71.4	0	3	0	1	+2
17	Cedi Osman C. Osman	10	3/17/2024	SAS	vs	BKN	14	3	0	0	0	4	7	57.1	2	4	50.0	0	0		71.4	0	3	1	1	-1
18	Cedi Osman C. Osman	10	2/27/2024	SAS	@	MIN	22	2	1	0	0	4	8	50.0	2	4	50.0	0	0		62.5	1	1	0	0	-16
19	Cedi Osman C. Osman	10	12/19/2023	SAS	@	MIL	19	2	1	0	0	3	6	50.0	0	2	0.0	4	4	100.0	64.4	0	2	0	1	-9
20	Cedi Osman C. Osman	10	12/11/2023	SAS	@	HOU	13	2	1	0	0	4	7	57.1	0	2	0.0	2	4	50.0	57.1	0	2	2	1	-3
21	Cedi Osman C. Osman	9	3/27/2024	SAS	@	UTA	19	7	6	1	0	3	5	60.0	3	3	100.0	0	0		90.0	1	6	1	4	+5
22	Cedi Osman C. Osman	9	1/24/2024	SAS	vs	OKC	14	0	0	0	1	3	5	60.0	1	3	33.3	2	3	66.7	71.2	0	0	0	0	-15
23	Cedi Osman C. Osman	9	1/13/2024	SAS	vs	CHI	23	2	1	1	0	3	5	60.0	3	5	60.0	0	0		90.0	0	2	0	3	+5
24	Cedi Osman C. Osman	9	1/7/2024	SAS	@	CLE	21	6	1	1	0	4	7	57.1	1	4	25.0	0	0		64.3	2	4	0	1	-19
25	Cedi Osman C. Osman	9	10/31/2023	SAS	@	PHX	19	2	1	1	0	4	7	57.1	1	2	50.0	0	1	0.0	60.5	0	2	0	0	+6