| ITF Canada F9 Qual | 09/19 14:00 | 44 | Nicholas Kamisar v Brandon Donaldson | 6-3,4-6,6-3 | |
| ITF Canada F9 Qual | 09/18 16:00 | 44 | Brandon Donaldson v Lakshit Sood | 6-2,6-0 | |
| ITF Canada F9 Qual | 09/17 14:00 | 44 | Brandon Donaldson v Justin Lunn | 6-2,6-2 | |
| ITF Canada F8 Qual | 09/10 13:00 | 44 | Michael Lippens v Brandon Donaldson | 6-1,5-7,6-1 | |
| ITF Canada F7 Qual | 09/05 16:00 | 44 | Washi Gervais v Brandon Donaldson | 6-3,6-2 | |
| ITF Canada F7 Qual | 09/04 14:00 | 44 | Tom Dynka v Brandon Donaldson | 1-6,1-6 | |
| ITF USA F27 Qual | 08/06 14:30 | 62 | Jarryd Woog v Brandon Donaldson | Retired | |
| ITF USA F26 Qual | 07/31 16:00 | 62 | Brandon Donaldson v Tom Fawcett | 2-6,1-6 | |
| ITF USA F26 Qual | 07/30 15:30 | 62 | Brandon Donaldson v Drew Van Orderlain | 6-2,6-3 | |
| ITF USA F25 Qual | 07/23 13:30 | 62 | Mico Santiago v Brandon Donaldson | 6-2,6-2 | |
| ITF USA F24 Qual | 07/16 15:30 | 62 | Brandon Donaldson v Eric Morris | 3-6,2-6 | |
| ITF USA F18 | 06/11 16:30 | 62 | Dominik Koepfer v Brandon Donaldson | 6-2,6-2 | |
| ITF Canada F2 Qual | 03/07 15:50 | 44 | Filip Peliwo v Brandon Donaldson | 6-1,6-2 | |
| ITF Canada F2 Qual | 03/06 13:00 | 44 | Brandon Donaldson v Nazar Achour | 2-6,7-5,6-0 | |
| ITF USA F7 Qual | 02/13 18:00 | 60 | Brandon Donaldson v Lourenco Gasperini | 3-6,4-6 | |
| ITF USA F6 | 01/30 15:00 | 60 | Aleksandar Kovacevic v Brandon Donaldson | 7-6,6-4 | |
| ITF USA F4 | 01/17 17:00 | 60 | Gabriel Carvajal v Brandon Donaldson | Retired | |
| ITF USA F35 | 11/28 14:00 | 62 | Jack Findel-Hawkins v Brandon Donaldson | 6-4,6-4 | |
| ITF USA F34 Qual | 11/21 15:00 | 62 | Colin Markes v Brandon Donaldson | 5-7,6-2,6-1 | |
| ITF Mexico F8 | 06/20 18:30 | - | Jorge E G Aramburu v Brandon Donaldson | 6-4,5-7,6-4 | |
| ITF Mexico F7 | 06/16 23:05 | - | Pavel Krainik v Brandon Donaldson | 6-3,6-4 | |
| ITF Mexico F7 | 06/13 15:00 | - | Alejandro Gomez v Brandon Donaldson | Retired | |
| ITF Mexico F6 | 06/08 15:30 | - | Farzin Danny Amiri v Brandon Donaldson | 6-3,6-4 | |
| ITF Mexico F6 | 06/07 18:30 | - | Brandon Donaldson v Jose Daniel Bendeck | 7-5,7-5 | |
| ITF USA F16 | 05/08 20:00 | - | Brandon Donaldson v Keisuke Numajiri | 1-6,2-6 | |
| ITF USA F15 Qual | 05/01 17:00 | - | Brandon Donaldson v Luis Britto | 3-6,1-6 | |
| ITF Canada F2 Qual | 03/07 16:00 | - | Brandon Donaldson v Alexander Donski | 6-7,6-7 | |
| ITF Canada F1 | 03/04 15:00 | - | Brandon Donaldson v Matteo Donati | 2-6,2-6 | |
| ITF Canada F1 Qual | 03/02 15:00 | - | Rached Rihani v Brandon Donaldson | 4-6,4-6 | |
| ITF USA F9 Qual | 02/20 18:00 | - | Brandon Donaldson v Myles Schalet | 3-6,2-6 |