Bale joined the squad in Cardiff on Monday following his world-record transfer to Real Madrid, but having not played since July, Coleman says he is unwilling to throw his star performer immediately into first-team action.
Wales' chances may be hampered somewhat as a result, with Bale having scored five of his country's last eight goals, but Coleman will not be taking any chances with the former Tottenham man.
"If he is not ready we will not risk him, regardless of whether it is a world record fee," he said.
"We are aware a lot of people will want to see him play in the home game against Serbia (on Tuesday).
"But he has no chance of playing 90 minutes on Friday or on Tuesday."
Dummett's chances of appearing were boosted as Swansea City left-back Neil Taylor was forced to pull out of the squad due to a thigh injury. Joe Allen (hamstring) and Neil Eardley (knee) were also forced to withdraw.
Macedonia currently sit bottom of Group A, with four points from six matches, two behind fourth-placed Wales, but coach Cedomir Janevski is looking at Friday's game – and Tuesday's visit of Scotland to Skopje – as a chance for his side to earn some points and climb the table.
"Before us are two very important but also difficult games," he said.
"It resumes our battle for a better final position in the standings. We do have a chance for the third place and that's a good motive for us.
"Our goal is to move up the table. Wales are a serious team, with exceptional quality and fighting spirit. They have a lot of players from the Premier League so we have to show them respect."
