Dylan Hartley has the right to appeal against his 11 week ban.
The Saints captain was sent off for allegedly calling referee Wayne Barnes a "f****** cheat" just before half-time in Leicester's 37-17 victory at Twickenham.
The RFU confirmed the suspension rules Hartley out of the Lions tour.
More top news
Some rain on Monday morning. Turning brighter through the afternoon.
Norwich City moved up to sixth in the Championship table after taking all three points in the derby clash against Ipswich Town.
The Labour leader has called the Norwich South MP's remark "completely unacceptable" and says Clive Lewis has personally apologised to him.