The phrase "also suggested that when" is correct and usable in written English.
It can be used when introducing a recommendation or idea that is conditional or dependent on a specific situation or context.
Example: "The researchers also suggested that when implementing the new policy, careful consideration of employee feedback is essential."
Alternatives: "also proposed that if" or "also indicated that when".
Their brain waves, as measured by electroencephalography, also suggested that when they were eventually allowed to sleep, they slept more deeply than owls.
But he also suggested that, when the Palestinian question is removed from the equation and the Arab-Israeli dispute is settled, Iran's ability to cause mischief will be lessened.
In the interview with BBC Radio 2's Sunday Hour, he also suggested that when he becomes king he may still be sworn in as Defender of the (Anglican) Faith, following years of speculation that the title could be changed to encompass all faiths.
He also suggested that when the International Atomic Energy Agency considers a resolution on November 24th on Iran's nuclear programme, he would advise the government to reverse its support for the American-led drive to refer it to the UN Security Council.
It is also suggested that, when a hose is designed to get shorter on pressurisation, length change may be a good indicator of manufacturing quality in terms of wire packing efficiency.
It was also suggested that when quoting another Twitter user, the tweet should include their "Twitter handle", which is the Twitter username of the quoted person preceded by the @ sign (e.g. @johndoe).
Yet Wade also suggests that, when the chips are down, the Darwinian instinct for survival triumphs over the comradely ethos.
Further studies also suggest that when donors are aware that a celebrity is endorsing multiple organisations they often doubt the endorser's trustworthiness which is definitely not a favourable outcome, especially when the charitable sector is built on trust.
But it also suggests that, when trade eventually brought Indian cattle to Africa, the zebu took the fancy of African stock-breeders, who deliberately studded their females with Indian males.
Nevertheless, the Scottish and Welsh examples also suggest that when local elites and chattering classes get enthused about regionalism as they clearly are in the North-West they refuse to drop the idea aNorth-West theyet theirefuse
Barbara John, the ombudsman for families of the NSU victims, also suggests that, when a crime involves a victim from an ethnic minority, investigators should look into possible neo-Nazi motives.
