QB Issue Resolution:

No, leave the checks connected. When you print the checks, you will have the option of choosing the voucher check style or the three checks to a page style. Choose the 3 checks to a page style. If you have only one check to print, only one will be printed on, save the remaining two for the next check run.

Resolution for Issue 'printing checks, my bank sent me business check and there are 3 checks per page. do i separate each check from the sheet to print' available: Yes (Solved).
Source: Intuit Community forum.

printing checks, my bank sent me business check and there are 3 checks per page. do i separate each check from the sheet to print: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for bank sent
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Error Recovery for bank sent [Canada]
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