| Inns | HS |
| 238-7 | 48 | Nepal Under-19s v New Zealand Under-19s | Khan Shaheb Osman Ali Stadium, Fatullah | 2015/16 |
| 205-5 | 45 | Nepal Under-19s v Scotland Under-19s | Colin Maiden Park, Auckland | 2001/02 |
| 197 | 39 | Nepal Under-19s v Pakistan Under-19s | Buffalo Park, East London | 2023/24 |
| 196† | 37* | Nepal Under-19s v England Under-19s | Moors Sports Club Ground, Colombo | 1999/00 |
| 180-6 | 41* | Nepal Under-19s v Bangladesh Under-19s | Lincoln No 3, Lincoln | 2001/02 |
| 177 | 34 | Nepal Under-19s v Papua New Guinea Under-19s | Hagley Park No 2, Christchurch | 2001/02 |
| 175 | 39 | Nepal Under-19s v Sri Lanka Under-19s | Penang Sports Club, Penang | 2007/08 |
| 171 | 32 | Nepal Under-19s v Ireland Under-19s | Endeavour Park, Townsville | 2012 |
| 169-8 | 37 | Nepal Under-19s v India Under-19s | Shere Bangla National Stadium, Mirpur | 2015/16 |
| 169 | 48 | Nepal Under-19s v Bangladesh Under-19s | Mangaung Oval, Bloemfontein | 2023/24 |
| 167 | 35* | Nepal Under-19s v England Under-19s | Lincoln No 3, Lincoln | 2001/02 |
| 165-9 | 33 | Nepal Under-19s v India Under-19s | Mangaung Oval, Bloemfontein | 2023/24 |
| 158 | 40 | Nepal Under-19s v Zimbabwe Under-19s | Institute Perguruan Temenggong Ibrahim, Johor | 2007/08 |
| 154-9 | 33 | Nepal Under-19s v Australia Under-19s | Chittagong Divisional Stadium, Chittagong | 2003/04 |
| 151 | 42 | Nepal Under-19s v Pakistan Under-19s | Lincoln Green, Lincoln | 2001/02 |
| 143-8 | 44 | Nepal Under-19s v Namibia Under-19s | Johor Cricket Academy Oval, Johor | 2007/08 |
| 132 | 34 | Nepal Under-19s v England Under-19s | Sinhalese Sports Club Ground, Colombo | 2005/06 |
| 130 | 30 | Nepal Under-19s v Bangladesh Under-19s | The Sevens Stadium, Dubai | 2025/26 |
| 110 | 30 | Nepal Under-19s v Zimbabwe Under-19s | Lincoln No 3, Lincoln | 2001/02 |
| 110 | 33* | Nepal Under-19s v Australia Under-19s | University Sains Malaysia, Penang | 2007/08 |
| 107 | 15 | Nepal Under-19s v Kenya Under-19s | Asgiriya Stadium, Kandy | 1999/00 |
| 104-1 | 41* | Nepal Under-19s v Canada Under-19s | Colin Maiden Park, Auckland | 2001/02 |
| 101-9 | 29 | Nepal Under-19s v India Under-19s | Police Park Ground, Colombo | 1999/00 |
| 90-4 | 27 | Nepal Under-19s v Papua New Guinea Under-19s | Peter Burge Oval, Brisbane | 2012 |
| 89 | 20 | Nepal Under-19s v Sri Lanka Under-19s | Tyronne Fernando Stadium, Moratuwa | 1999/00 |
| 82 | 22 | Nepal Under-19s v Australia Under-19s | Tony Ireland Stadium, Townsville | 2012 |
| 82 | 18 | Nepal Under-19s v Sri Lanka Under-19s | The Sevens Stadium, Dubai | 2025/26 |
| 79 | 22 | Nepal Under-19s v Sri Lanka Under-19s | Peter Burge Oval, Brisbane | 2012 |
| 74 | 17* | Nepal Under-19s v West Indies Under-19s | Bayuemas Oval, Kuala Lumpur | 2007/08 |
| 24-4 | 11 | Nepal Under-19s v South Africa Under-19s | Air Force Ground, Katunayake | 1999/00 |
