Boland has 28 wickets from seven Tests with an extraordinary average of 13.42
FIFA said the change was due to the unusual timing of the tournament as well as the impact of COVID-19 on squads. The showpiece event in Qatar will run from Nov 21-Dec 18.
"The number of players to be included on the final list has been increased to at least 23 and a maximum of 26," it said in a statement.
"No more than 26 people (up to 15 substitutes and 11 team officials) will be allowed to sit on the team bench."
UEFA took a similar decision last year, allowing sides to pick three extra players for the European Championship due to the pandemic.
The International Football Association Board this month gave the green light to the use of five substitutions in matches, which was initially introduced as a tweak to the rules because of COVID-19.