Singapore in Europe? I'll have to relearn my geography.
Please, mate ... save the point scoring for another day!
Singapore as a participant in the Asiatic lion EEP. It has been known to happen in other EEP taxa (f.i. drill Mandrillus leucocephalus) too, you know!!
Besides apart from a possible Indian zoos coop, there is no other region with other than the EAZA/EEP that operates a coop programme for Asiatic lions.
The few hybrid specimens outside India can be safely ignored.