Once an investment is committed, you will not be able to withdraw from it. 

To be fair to the SMEs, any withdrawals would disrupt the crowdfunding process and delay funds disbursal. If the note has already been disbursed to the SME, last minute withdrawals may also cause delays in their growth and expansion plans. 

Not forgetting the other investors who may have wanted to invest in the same note, but missed out because the note was fully funded. 

Hence, do review your note selections carefully before confirming an investment.