The minimum deposit amount can vary among online casinos without Gamstop in the UK. While some casinos have minimum deposit requirements as low as £1 or £3, others may require a higher minimum deposit, such as £10 or £20. To help you play with as low as £3, we have researched all the top sites allowing a minimum deposit of just £3. Of course, you can still deposit amounts higher than the 3 Pounds to make high wagers or increase your potential payout.