| Kaspar Treier | |
| Position: | Small forward |
| Height M: | 2.04 |
| Weight Kg: | 105 |
| League: | LBA |
| Team: | Napoli Basket |
| Number: | 3 |
| Birth Date: | 19 September 1999 |
| Birth Place: | Tartu, Estonia |
| Years1: | 2016–2017 |
| Years2: | 2017–2019 |
| Team2: | Poderosa Montegranaro |
| Years3: | 2019–2020 |
| Team3: | Basket Ravenna |
| Years4: | 2020–2024 |
| Team4: | Dinamo Sassari |
| Years5: | 2024–present |
| Team5: | Napoli Basket |
Kaspar Treier (born 19 September 1999) is an Estonian professional basketball player for Napoli Basket of the Italian Lega Basket Serie A (LBA). He also represents the Estonian national basketball team internationally. Standing at 2.04m (06.69feet), he plays at the small forward position.
Treier began playing basketball with Erkmaa academy before moving to in August 2014.
On 4 August 2017, Treier signed with Poderosa Montegranaro of the Serie A2.[1]
In 2017 he won Italian Championship Under 21 and he was named MVP.
On 10 June 2019, Treier signed with Felice Scandone of the Lega Basket Serie A (LBA).[2]
In July 2019, Treier signed with Basket Ravenna of the Serie A2 Basket (LNP)
On 3 July 2020, Treier signed a three-year deal with Dinamo Sassari of the Lega Basket Serie A (LBA).[3]
On June 13, 2024, he signed with Napoli Basket of the Italian Lega Basket Serie A (LBA).[4]
With national Team Under 16 he won the European Division B in 2015.Treier made his debut for the Estonian national team on 30 November 2018, in a 2019 FIBA Basketball World Cup qualifier against Georgia.[5]