Can the transaction last more than three days in blockchain?

[Karitra1]

 ???I hope that does not exceed this limit

[Sewarlock]

usually it's not the case, it should be completed within 3-4 hours max, depending on the gas you pay

sometimes the blockchain is "overloaded" though and depending when you've made the transaction it might be one of those cases

[Refozzblaze]

???I hope that does not exceed this limit

If You Talk About Bitcoin
Yes Its Possible
Just Try Send Some Bitcoin with 0 Fees While The Recommended Fee Is 100K Satoshi (Determined From bitcoinfees21.co)(At 4 August 2017)
My Friends Use 10K Satoshi Fees And The Payment Stuck For 2 Weeks