The Selecao skipper was hit with the suspension following his sending off after the full-time whistle in his country's Copa America group stage clash with Colombia, before then clashing with match referee Enrique Osses in the tunnel.
The CBF ultimately opted against challenging the sanction, which ended Neymar's tournament, and that decision was met with fury by former Brazil striker Romario, who accused the governing body of not only failing the Barcelona attacker but also the nation.
However, Feldman has defended the decision, claiming the choice was made by Dunga and his fellow Selecao coaches for Neymar's benefit.
"These are difficult times when we must make a decision and only time will show whether it was successful or not," the CBF official told Esporte Espectacular.
"The coaching staff did not hesitate and asked us not challenge the sanction because it was best for Neymar."
Brazil's Copa America elimination at the hands of Paraguay in the quarter-finals means that Neymar will remain sidelined for a further two games, ruling him out of the start of the country's bid to qualify for the 2018 World Cup.