The Reds dropped Wallaby wing Digby Ioane from this weekend's Super Rugby match against Western Force following an incident at a pub in Melbourne.
Police in Victoria state said they were investigating an alleged assault of a 30-year-old man, who sustained a minor leg injury on Saturday night - with Ioane interviewed.
The QRU had a meeting with the player Monday and in a statement said both parties agreed that Ioane had "failed to demonstrate the necessary behaviour expected of a senior player" within the Reds squad.
"Digby has taken responsibility for his actions and is cognisant of the high standards and organisational values expected of each member of the Reds squad both on and off the field," the statement read.
"These expectations have also been reinforced to all members in the Reds squad on Monday afternoon."
The QRU made clear the decision was related directly to the expectations on Ioane as a senior team member, and not as an outcome of the police enquiries.
"Digby will continue to train with the Reds and will be available for selection next week in the team's round six Super Rugby match against the Bulls in Brisbane," the QRU said.
The alleged weekend incident happened the night after the Reds beat the Rebels in Melbourne.
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.