旅游签证延期Unsuccessful submission. You do not fulfil the conditions f...

信息给的太少，没法判断

要提前至少3个工作日（到期时间）

任何条件不满足的时候，就不能在网上延期了，
接下来，要本人去ICA亲自提交材料了

就一句话没头没尾咋解

ConditionsIf you fulfill all the following conditions, you can submitan application online.a)            You havenot previously obtained an extension of stay on this tripb)            You wishto extend your stay up to 89 days from date of entry to Singaporec)            Yourvisit pass has a remaining validity of at least 3 working days from date ofsubmission. (Note: Working days are from Monday to Saturday, excluding publicholidays)d)            You willnot return to Singapore within 5 days from the departure date of your currenttripIf you confirm that you fulfill all the above conditions andagree that you will not be seeking any (further) extension after thisapplication, irrespective of the outcome, you maya)            ClickExtension up to 30 days link in the main menu if you wish to apply forextension up to 30 days from expiry of current visit passb)            ClickExtension up to 30 days (for applicants travelling as a family) link in themain menu if you and/or your family member(s) wish to apply for extension up to30 days from expiry of current visit passc)            ClickExtension up to 89 days link in the main menu if you wish to apply forextension up to 89 days from date of entry and fulfill the following criteria:-(i)            You area foreigner with family ties where your immediate family members are SingaporeCitizen or Singapore Permanent Resident and you are able to furnish originalsupporting documentary evidence to establish relationship; or(ii)           You area foreigner who is seeking medical treatment in Singapore and are able to furnishoriginal letter from a Singapore registered doctor to support your extension ofstay.Travellers who do not fulfill the above conditions wouldneed to apply for an extension in person at the Visitor Services Centre (4thStorey), ICA Building.

直系亲属可以在柜台延期

延期时间和签证到期时间相差小于三天。