A Welsh Rugby Union spokesman said: "Gary Speed was a talented sportsman, an excellent ambassador for soccer and a true gentleman.
"As Wales Football Manager he was achieving a level of success which was raising the Welsh international game to new levels.
"He represented values and a work ethic which had a resonance to the ambitions of everyone involved in rugby.
"We will all miss him and his memory will undoubtedly live on through his achievements.
"It is important for rugby to pay its respects to Gary Speed and the international on Saturday, which is the first for a Welsh team since his passing, is a fitting opportunity for that tribute to be paid."