We will hold the funds in escrow for 3 days - at which time, we will release the funds.
Who said this?
this is standard bittrex terms for ICO's

So Does this mean markets will only open on Wednesday?
No that's a quote from the main post.
Indicating that Bittrex would hold the ICO funds in escrow for 3 days, until they would release it which would be after trading launches, which is today.