Del Bosque implemented the move before the Spanish squad left their training camp in Las Rozas, outside Madrid, and the national coach has said that the ban would remain in South Africa.
An official for the Spanish FA said that Del Bosque wanted “no distractions” as the European champions look to win the biggest prize in football.
Meanwhile Spain's uncapped Pedro and Javi Martinez drew lots to decide which of them has to wear the unwanted number two shirt at the World Cup - and Pedro lost.
"Javi and I were the only ones left to choose a number as we were the last to arrive and the truth is that neither of us were particularly excited about wearing the number two," Barcelona forward Pedro said.
"So we drew lots and I got it," he added. "In any case, it doesn't matter and it won't be a problem."
Pedro, who was not keen to wear the number two usually sported by a defender, said the 17 he has at Barca had already been snapped up by Real Madrid fullback Alvaro Arbeloa.
"Arbeloa already chose his number and it doesn't bother me," said Pedro, who like Martinez has been called up for the first time. "In the end I got that number (two) and have to wear it."
Athletic Bilbao midfielder Martinez, a surprise inclusion in Vicente del Bosque's 23-man World Cup squad, wears the number 24 for his club and will have 20 on his back for Spain.
Source: The Telegraph