A well-advertised deadline for entries closed on June 11, but due to a number of oversights by their own administrators the athletes were not entered and faced missing their events.
The officials from the eight countries sought special dispensation from the Commonwealth Games Federation for a total of 48 affected athletes.
"The CGF Executive Board took the view that wherever possible athletes should not suffer because of the failings of their administrators," said CGF President, HRH Prince Imran.
"But we also had to ensure that the extra numbers could be accommodated at this very late stage within the existing complex operations and schedules, and without unfairly impact on those properly entered.
"We thank the Glasgow Organising Committee for working through the issues at this very busy time to allow us to assist the athletes."
"The CGF and the Organising Committee are committed to these Games being athlete-centred and sport focused."
All 48 athletes affected will now be able to partake in the Games.
"These athletes have trained for years for the opportunity to take part at Glasgow and we welcome them to these Commonwealth Games and wish them well," said Prince Imran.
"But these situations must be avoided in the future. There is an on-going review of the sports program which will culminate at our General Assembly next year in Auckland and the CGF Board will, as part of that process, look at imposing sanctions against those Commonwealth Games Associations who fail to meet important deadlines that impact on the Games' operations and their own athletes."