The pre-orders run until Sunday with associated cashback offers and giveaways of up to Bt9,950.
People can be ordered online.
11street will gift the Bt12,900 Samsung Gear 3 to the 11th, 111th and 311th people who place an order.
11street members can opt for a 0 per cent installment plan for up to 10 months and get up to Bt2,000 cash back when paying with participating credit cards.
Buyers will get a Bt500 bonus coupon for shopping at 11street.
Ha Woo Seong, 11street Thailand vice president, said the collaboration provided increased convenience and access to Samsung's flagship mobile phones.
Product shipments start April 28.
The Galaxy S8 and S8+ are available in midnight black, orchid gray and maple gold colours.