| Marcus Smart Rankings 2020-2021 | Stats Glossary  |
| Games with .322 or more 3-point Percentage | Boston Celtics Record : 17 - 14 | Marcus Smart |
| No | Date | Game | Res | Score | 3-point Percentage |
| 1 | May 28 | vs Brooklyn | W | 125-119 | .625 |
| 2 | May 25 | at Brooklyn | L | 108-130 | .625 |
| 3 | May 22 | at Brooklyn | L | 93-104 | .375 |
| 4 | May 11 | vs Miami | L | 121-129 | .333 |
| 5 | May 5 | at Orlando | W | 132-96 | .333 |
| 6 | May 2 | vs Portland | L | 119-129 | .333 |
| 7 | Apr 25 | at Charlotte | L | 104-125 | .429 |
| 8 | Apr 15 | at L.A.Lakers | W | 121-113 | .500 |
| 9 | Apr 13 | at Portland | W | 116-115 | .600 |
| 10 | Apr 11 | at Denver | W | 105-87 | .333 |
| 11 | Apr 9 | vs Minnesota | W | 145-136 | .500 |
| 12 | Apr 7 | vs New_York | W | 101-99 | .500 |
| 13 | Apr 6 | vs Philadelphia | L | 96-106 | .333 |
| 14 | Apr 4 | vs Charlotte | W | 116-86 | .571 |
| 15 | Mar 26 | at Milwaukee | W | 122-114 | .700 |
| 16 | Mar 22 | at Memphis | L | 126-132 | .333 |
| 17 | Mar 21 | vs Orlando | W | 112-96 | .400 |
| 18 | Mar 19 | vs Sacramento | L | 96-107 | .333 |
| 19 | Mar 17 | at Cleveland | L | 110-117 | .444 |
| 20 | Mar 14 | at Houston | W | 134-107 | .500 |
| 21 | Mar 11 | at Brooklyn | L | 109-121 | .600 |
| 22 | Jan 25 | at Chicago | W | 119-103 | .333 |
| 23 | Jan 24 | vs Cleveland | W | 141-103 | .500 |
| 24 | Jan 22 | at Philadelphia | L | 110-122 | .400 |
| 25 | Jan 15 | vs Orlando | W | 124-97 | .400 |
| 26 | Jan 6 | at Miami | W | 107-105 | .333 |
| 27 | Jan 1 | at Detroit | L | 93-96 | .500 |
| 28 | Dec 30 | vs Memphis | W | 126-107 | .444 |
| 29 | Dec 29 | at Indiana | W | 116-111 | .500 |
| 30 | Dec 27 | at Indiana | L | 107-108 | .500 |
| 31 | Dec 25 | vs Brooklyn | L | 95-123 | .429 |
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