The international break follows Saturday’s match, before games against Millwall [home], Swansea City [away] and Derby County [away] in October.
Stephan gave starts to Steve Cook, Isaac Hayden, Sam Field, Kader Dembele and Michael Frey on Wednesday and said there would be further rotation in Bristol.
“I think it’s very important, particularly at this moment of the season, to use a lot of players,” he said.
“Because I’m not thinking about the three games, I’m thinking about the next weeks and next months and I know that in November, December, January, we will have a lot of three games in a week.
“So it’s impossible to play with only 12 or 13 players. So yes, we will probably have some different players on the pitch tomorrow.”