What If A Block Size Limit In A Certain Blockchain Is Exceeded And A New Block Isn't Yet Created?

What if a block size limit in the Bitcoin blockchain or any other blockchain is exceeded and at that time a new block isn't yet mined? I have been thinking about this lately and I haven't found any article pertaining to this. Thanks in advance.

in the context of bitcoin , you are missing mempoolsize with block size, transactions are stored in mempool which acts as a (pool obviously), miners take transactions out of the pool and put it in a block and try to ming it(find a Nounce for it) so.

if a new block is not mined the new transactions are piling up in the mempool, miners may let the mempool to grow for a while but at somepoint they will not have the resources and would be forced to reject new transactions.

this will have a negative effect on the network, would drive down the price and disinsetivise miners to try more... slowly blockchain would die... unless a hard fork happens